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		<id>https://www.explainxkcd.com/wiki/index.php?action=history&amp;feed=atom&amp;title=3043%3A_Muons</id>
		<title>3043: Muons - Revision history</title>
		<link rel="self" type="application/atom+xml" href="https://www.explainxkcd.com/wiki/index.php?action=history&amp;feed=atom&amp;title=3043%3A_Muons"/>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;action=history"/>
		<updated>2026-04-17T11:43:26Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
		<generator>MediaWiki 1.30.0</generator>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=388512&amp;oldid=prev</id>
		<title>Black Hat's Hat: That's a good transcript. deleted incomplete tag</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=388512&amp;oldid=prev"/>
				<updated>2025-10-09T13:49:09Z</updated>
		
		<summary type="html">&lt;p&gt;That&amp;#039;s a good transcript. deleted incomplete tag&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 13:49, 9 October 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l23&quot; &gt;Line 23:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 23:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:[Cueball is standing in front of a whiteboard, which contains a diagram depicting a muon passing through the atmosphere, a distance labeled with a cursive letter, the equation for the Lorentz factor, and some illegible text. He's facing away from the whiteboard and holding a pointer that points towards the diagram.]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:[Cueball is standing in front of a whiteboard, which contains a diagram depicting a muon passing through the atmosphere, a distance labeled with a cursive letter, the equation for the Lorentz factor, and some illegible text. He's facing away from the whiteboard and holding a pointer that points towards the diagram.]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Cueball: ''Muons'' created in the upper atmosphere decay immediately, but fast moving ''muuuuuoooons'' are able to reach the surface due to their longer half-lives.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Cueball: ''Muons'' created in the upper atmosphere decay immediately, but fast moving ''muuuuuoooons'' are able to reach the surface due to their longer half-lives.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Black Hat's Hat</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=378436&amp;oldid=prev</id>
		<title>Kynde: /* Explanation */</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=378436&amp;oldid=prev"/>
				<updated>2025-05-23T18:50:35Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 18:50, 23 May 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l10&quot; &gt;Line 10:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 10:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;This is another one of [[Randall|Randall's]] [[:Category: Tips|Tips]], this time a Physics tip. &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{w|Muon|Muons}} are elementary sub-atomic particles, often released in {{w|air shower (physics)|air showers}} from high-energy {{w|cosmic ray}} protons causing nuclear decay in our upper atmosphere. These protons come from all over the universe from various interstellar events and have energies in excess of anything our species has created. Some of the muons created in these collisions are deflected away from us and decay quickly in the upper atmosphere. Other muons retain the high energy of the colliding protons and travel so fast that they emit {{w|Cherenkov radiation}} from outpacing photons in air, which is used to visualize air showers with telescopes. Muons usually decay very quickly, but because, in part, of {{w|time dilation}} these high-energy muons are able to penetrate densely deep into the earth. They are also used as a natural radiation source, more powerful than x-rays, for internal imaging, especially of large opaque structures.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{w|Muon|Muons}} are elementary sub-atomic particles, often released in {{w|air shower (physics)|air showers}} from high-energy {{w|cosmic ray}} protons causing nuclear decay in our upper atmosphere. These protons come from all over the universe from various interstellar events and have energies in excess of anything our species has created. Some of the muons created in these collisions are deflected away from us and decay quickly in the upper atmosphere. Other muons retain the high energy of the colliding protons and travel so fast that they emit {{w|Cherenkov radiation}} from outpacing photons in air, which is used to visualize air showers with telescopes. Muons usually decay very quickly, but because, in part, of {{w|time dilation}} these high-energy muons are able to penetrate densely deep into the earth. They are also used as a natural radiation source, more powerful than x-rays, for internal imaging, especially of large opaque structures.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Kynde</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=365841&amp;oldid=prev</id>
		<title>B for brain: /* Explanation */ Removed Incomplete tag</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=365841&amp;oldid=prev"/>
				<updated>2025-02-15T23:04:24Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation: &lt;/span&gt; Removed Incomplete tag&lt;/span&gt;&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 23:04, 15 February 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l10&quot; &gt;Line 10:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 10:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;{{incomplete|Created by THE OMG PARTICLE. Do NOT delete this tag too soon.}}&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{w|Muon|Muons}} are elementary sub-atomic particles, often released in {{w|air shower (physics)|air showers}} from high-energy {{w|cosmic ray}} protons causing nuclear decay in our upper atmosphere. These protons come from all over the universe from various interstellar events and have energies in excess of anything our species has created. Some of the muons created in these collisions are deflected away from us and decay quickly in the upper atmosphere. Other muons retain the high energy of the colliding protons and travel so fast that they emit {{w|Cherenkov radiation}} from outpacing photons in air, which is used to visualize air showers with telescopes. Muons usually decay very quickly, but because, in part, of {{w|time dilation}} these high-energy muons are able to penetrate densely deep into the earth. They are also used as a natural radiation source, more powerful than x-rays, for internal imaging, especially of large opaque structures.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{w|Muon|Muons}} are elementary sub-atomic particles, often released in {{w|air shower (physics)|air showers}} from high-energy {{w|cosmic ray}} protons causing nuclear decay in our upper atmosphere. These protons come from all over the universe from various interstellar events and have energies in excess of anything our species has created. Some of the muons created in these collisions are deflected away from us and decay quickly in the upper atmosphere. Other muons retain the high energy of the colliding protons and travel so fast that they emit {{w|Cherenkov radiation}} from outpacing photons in air, which is used to visualize air showers with telescopes. Muons usually decay very quickly, but because, in part, of {{w|time dilation}} these high-energy muons are able to penetrate densely deep into the earth. They are also used as a natural radiation source, more powerful than x-rays, for internal imaging, especially of large opaque structures.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>B for brain</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=364209&amp;oldid=prev</id>
		<title>172.70.162.125: /* Explanation */ Probably better to just have the full name/unredirected link, as per typical site standard</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=364209&amp;oldid=prev"/>
				<updated>2025-02-01T09:25:52Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation: &lt;/span&gt; Probably better to just have the full name/unredirected link, as per typical site standard&lt;/span&gt;&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 09:25, 1 February 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l18&quot; &gt;Line 18:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 18:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cueball is implying that when he says &amp;quot;muons&amp;quot;, he is speaking in the same reference frame as them, with time traveling at the same speed for the listener and for the muon. In the same reference frame, muons decay very quickly. He implies that when he says &amp;quot;muuuoooons&amp;quot; very slowly, that he is now speaking in a reference frame where the muons have time dilated relative to the observer and appear to be aging very very slowly. If a relativistic muon were saying its own name, or if Cueball were in the same reference frame as the muon and the observer were not, (and there were a way to transmit sound at relativistic speeds), then the muon might sound like this, stretched out. This is the kind of reference frame in which muons are detected at the surface. We observe them, and we observe that time is passing slower for them than it is for us.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cueball is implying that when he says &amp;quot;muons&amp;quot;, he is speaking in the same reference frame as them, with time traveling at the same speed for the listener and for the muon. In the same reference frame, muons decay very quickly. He implies that when he says &amp;quot;muuuoooons&amp;quot; very slowly, that he is now speaking in a reference frame where the muons have time dilated relative to the observer and appear to be aging very very slowly. If a relativistic muon were saying its own name, or if Cueball were in the same reference frame as the muon and the observer were not, (and there were a way to transmit sound at relativistic speeds), then the muon might sound like this, stretched out. This is the kind of reference frame in which muons are detected at the surface. We observe them, and we observe that time is passing slower for them than it is for us.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On average, a stationary muon decays after a bit over {{w|Muon#Muon_Decay|two microseconds}}. While moving at {{w|Muon#&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Muon_Decay&lt;/del&gt;|99.97% of the speed of light}}, their lifespan (from our perspective) stretches to nearly ninety microseconds (a {{w|Lorentz factor}} of ~40.8). If Cueball speaks at four syllables per second (a typical {{w|Speech tempo|speech tempo}} for English), it will take him about half of a second to name the &amp;quot;muons&amp;quot; created in the upper atmosphere; it will take him more than twenty seconds to name the fast-moving &amp;quot;muuuuuoooons.&amp;quot; &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On average, a stationary muon decays after a bit over {{w|Muon#Muon_Decay|two microseconds}}. While moving at {{w|Muon#&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Muon Decay&lt;/ins&gt;|99.97% of the speed of light}}, their lifespan (from our perspective) stretches to nearly ninety microseconds (a {{w|Lorentz factor}} of ~40.8). If Cueball speaks at four syllables per second (a typical {{w|Speech tempo|speech tempo}} for English), it will take him about half of a second to name the &amp;quot;muons&amp;quot; created in the upper atmosphere; it will take him more than twenty seconds to name the fast-moving &amp;quot;muuuuuoooons.&amp;quot; &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text references the {{w|Doppler effect}}, the change in frequency of a wave when the observer is moving relative to the source. One common example of this is how the sound to a stationary observer of a fast car or airplane starts at a high pitched note but then drops to a low droning noise as it passes. By analogy with the time dilation example, Cueball likely imitates this change in pitch and speed of syllables whenever pronouncing the phrase &amp;quot;Doppler effect&amp;quot; ('Dop-llllerrrr eehfffffeeeehccccctttth'). Languages in Randall's native language family do not represent different words or sounds with different pitches, so speaking &amp;quot;Doppler effect&amp;quot; with the timing and pitch changes of a real doppler effect of a fast-moving object passing a listener, would be quite jarring and distracting to hear conversationally. Alternatively, he may be stretching out the &amp;quot;p&amp;quot; sound by saying &amp;quot;p-p-p-p&amp;quot;, producing a spitting or {{w|&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Blowing_a_raspberry&lt;/del&gt;|&amp;quot;raspberry&amp;quot;}} sound, which would be highly offensive.{{cn}} For more on Doppler effect, see [[1531&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;|&lt;/del&gt;BDLPSWDKS]].&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text references the {{w|Doppler effect}}, the change in frequency of a wave when the observer is moving relative to the source. One common example of this is how the sound to a stationary observer of a fast car or airplane starts at a high pitched note but then drops to a low droning noise as it passes. By analogy with the time dilation example, Cueball likely imitates this change in pitch and speed of syllables whenever pronouncing the phrase &amp;quot;Doppler effect&amp;quot; ('Dop-llllerrrr eehfffffeeeehccccctttth'). Languages in Randall's native language family do not represent different words or sounds with different pitches, so speaking &amp;quot;Doppler effect&amp;quot; with the timing and pitch changes of a real doppler effect of a fast-moving object passing a listener, would &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;at least be understood, although could &lt;/ins&gt;be quite jarring and distracting to hear conversationally. Alternatively, he may be stretching out the &amp;quot;p&amp;quot; sound by saying &amp;quot;p-p-p-p&amp;quot;, producing a spitting or {{w|&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Blowing a raspberry&lt;/ins&gt;|&amp;quot;raspberry&amp;quot;}} sound, which would be highly offensive.{{cn}} For more on Doppler effect, see [[1531&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;: The &lt;/ins&gt;BDLPSWDKS &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Effect&lt;/ins&gt;]].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>172.70.162.125</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=364197&amp;oldid=prev</id>
		<title>172.71.98.144: /* Explanation */</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=364197&amp;oldid=prev"/>
				<updated>2025-02-01T04:05:33Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 04:05, 1 February 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l20&quot; &gt;Line 20:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 20:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On average, a stationary muon decays after a bit over {{w|Muon#Muon_Decay|two microseconds}}. While moving at {{w|Muon#Muon_Decay|99.97% of the speed of light}}, their lifespan (from our perspective) stretches to nearly ninety microseconds (a {{w|Lorentz factor}} of ~40.8). If Cueball speaks at four syllables per second (a typical {{w|Speech tempo|speech tempo}} for English), it will take him about half of a second to name the &amp;quot;muons&amp;quot; created in the upper atmosphere; it will take him more than twenty seconds to name the fast-moving &amp;quot;muuuuuoooons.&amp;quot; &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On average, a stationary muon decays after a bit over {{w|Muon#Muon_Decay|two microseconds}}. While moving at {{w|Muon#Muon_Decay|99.97% of the speed of light}}, their lifespan (from our perspective) stretches to nearly ninety microseconds (a {{w|Lorentz factor}} of ~40.8). If Cueball speaks at four syllables per second (a typical {{w|Speech tempo|speech tempo}} for English), it will take him about half of a second to name the &amp;quot;muons&amp;quot; created in the upper atmosphere; it will take him more than twenty seconds to name the fast-moving &amp;quot;muuuuuoooons.&amp;quot; &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text references the {{w|Doppler effect}}, the change in frequency of a wave when the observer is moving relative to the source. One common example of this is how the sound to a stationary observer of a fast car or airplane starts at a high pitched note but then drops to a low droning noise as it passes. By analogy with the time dilation example, Cueball likely imitates this change in pitch and speed of syllables whenever pronouncing the phrase &amp;quot;Doppler effect&amp;quot; ('Dop-llllerrrr eehfffffeeeehccccctttth'). Languages in Randall's native language family do not represent different words or sounds with different pitches, so speaking &amp;quot;Doppler effect&amp;quot; with the timing and pitch changes of a real doppler effect of a fast-moving object passing a listener, would be quite jarring and distracting to hear conversationally. Alternatively, he may be stretching out the &amp;quot;p&amp;quot; sound by saying &amp;quot;p-p-p-p&amp;quot;, producing a spitting or {{w|Blowing_a_raspberry|&amp;quot;raspberry&amp;quot;}} sound, which would be highly offensive.{{cn}} For more on Doppler effect, see [[BDLPSWDKS]].&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text references the {{w|Doppler effect}}, the change in frequency of a wave when the observer is moving relative to the source. One common example of this is how the sound to a stationary observer of a fast car or airplane starts at a high pitched note but then drops to a low droning noise as it passes. By analogy with the time dilation example, Cueball likely imitates this change in pitch and speed of syllables whenever pronouncing the phrase &amp;quot;Doppler effect&amp;quot; ('Dop-llllerrrr eehfffffeeeehccccctttth'). Languages in Randall's native language family do not represent different words or sounds with different pitches, so speaking &amp;quot;Doppler effect&amp;quot; with the timing and pitch changes of a real doppler effect of a fast-moving object passing a listener, would be quite jarring and distracting to hear conversationally. Alternatively, he may be stretching out the &amp;quot;p&amp;quot; sound by saying &amp;quot;p-p-p-p&amp;quot;, producing a spitting or {{w|Blowing_a_raspberry|&amp;quot;raspberry&amp;quot;}} sound, which would be highly offensive.{{cn}} For more on Doppler effect, see [[&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;1531|&lt;/ins&gt;BDLPSWDKS]].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>172.71.98.144</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=364187&amp;oldid=prev</id>
		<title>108.162.245.185 at 01:36, 1 February 2025</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=364187&amp;oldid=prev"/>
				<updated>2025-02-01T01:36:54Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 01:36, 1 February 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l20&quot; &gt;Line 20:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 20:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On average, a stationary muon decays after a bit over {{w|Muon#Muon_Decay|two microseconds}}. While moving at {{w|Muon#Muon_Decay|99.97% of the speed of light}}, their lifespan (from our perspective) stretches to nearly ninety microseconds (a {{w|Lorentz factor}} of ~40.8). If Cueball speaks at four syllables per second (a typical {{w|Speech tempo|speech tempo}} for English), it will take him about half of a second to name the &amp;quot;muons&amp;quot; created in the upper atmosphere; it will take him more than twenty seconds to name the fast-moving &amp;quot;muuuuuoooons.&amp;quot; &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On average, a stationary muon decays after a bit over {{w|Muon#Muon_Decay|two microseconds}}. While moving at {{w|Muon#Muon_Decay|99.97% of the speed of light}}, their lifespan (from our perspective) stretches to nearly ninety microseconds (a {{w|Lorentz factor}} of ~40.8). If Cueball speaks at four syllables per second (a typical {{w|Speech tempo|speech tempo}} for English), it will take him about half of a second to name the &amp;quot;muons&amp;quot; created in the upper atmosphere; it will take him more than twenty seconds to name the fast-moving &amp;quot;muuuuuoooons.&amp;quot; &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text references the {{w|Doppler effect}}, the change in frequency of a wave when the observer is moving relative to the source. One common example of this is how the sound to a stationary observer of a fast car or airplane starts at a high pitched note but then drops to a low droning noise as it passes. By analogy with the time dilation example, Cueball likely imitates this change in pitch and speed of syllables whenever pronouncing the phrase &amp;quot;Doppler effect&amp;quot; ('Dop-llllerrrr eehfffffeeeehccccctttth'). Languages in Randall's native language family do not represent different words or sounds with different pitches, so speaking &amp;quot;Doppler effect&amp;quot; with the timing and pitch changes of a real doppler effect of a fast-moving object passing a listener, would be quite jarring and distracting to hear conversationally. Alternatively, he may be stretching out the &amp;quot;p&amp;quot; sound by saying &amp;quot;p-p-p-p&amp;quot;, producing a spitting or {{w|Blowing_a_raspberry|&amp;quot;raspberry&amp;quot;}} sound, which would be highly offensive.{{cn}}&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text references the {{w|Doppler effect}}, the change in frequency of a wave when the observer is moving relative to the source. One common example of this is how the sound to a stationary observer of a fast car or airplane starts at a high pitched note but then drops to a low droning noise as it passes. By analogy with the time dilation example, Cueball likely imitates this change in pitch and speed of syllables whenever pronouncing the phrase &amp;quot;Doppler effect&amp;quot; ('Dop-llllerrrr eehfffffeeeehccccctttth'). Languages in Randall's native language family do not represent different words or sounds with different pitches, so speaking &amp;quot;Doppler effect&amp;quot; with the timing and pitch changes of a real doppler effect of a fast-moving object passing a listener, would be quite jarring and distracting to hear conversationally. Alternatively, he may be stretching out the &amp;quot;p&amp;quot; sound by saying &amp;quot;p-p-p-p&amp;quot;, producing a spitting or {{w|Blowing_a_raspberry|&amp;quot;raspberry&amp;quot;}} sound, which would be highly offensive.{{cn}} &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;For more on Doppler effect, see [[BDLPSWDKS]].&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>108.162.245.185</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=364055&amp;oldid=prev</id>
		<title>162.158.174.30: citation needed</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=364055&amp;oldid=prev"/>
				<updated>2025-01-30T21:21:44Z</updated>
		
		<summary type="html">&lt;p&gt;citation needed&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 21:21, 30 January 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l20&quot; &gt;Line 20:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 20:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On average, a stationary muon decays after a bit over {{w|Muon#Muon_Decay|two microseconds}}. While moving at {{w|Muon#Muon_Decay|99.97% of the speed of light}}, their lifespan (from our perspective) stretches to nearly ninety microseconds (a {{w|Lorentz factor}} of ~40.8). If Cueball speaks at four syllables per second (a typical {{w|Speech tempo|speech tempo}} for English), it will take him about half of a second to name the &amp;quot;muons&amp;quot; created in the upper atmosphere; it will take him more than twenty seconds to name the fast-moving &amp;quot;muuuuuoooons.&amp;quot; &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On average, a stationary muon decays after a bit over {{w|Muon#Muon_Decay|two microseconds}}. While moving at {{w|Muon#Muon_Decay|99.97% of the speed of light}}, their lifespan (from our perspective) stretches to nearly ninety microseconds (a {{w|Lorentz factor}} of ~40.8). If Cueball speaks at four syllables per second (a typical {{w|Speech tempo|speech tempo}} for English), it will take him about half of a second to name the &amp;quot;muons&amp;quot; created in the upper atmosphere; it will take him more than twenty seconds to name the fast-moving &amp;quot;muuuuuoooons.&amp;quot; &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text references the {{w|Doppler effect}}, the change in frequency of a wave when the observer is moving relative to the source. One common example of this is how the sound to a stationary observer of a fast car or airplane starts at a high pitched note but then drops to a low droning noise as it passes. By analogy with the time dilation example, Cueball likely imitates this change in pitch and speed of syllables whenever pronouncing the phrase &amp;quot;Doppler effect&amp;quot; ('Dop-llllerrrr eehfffffeeeehccccctttth'). Languages in Randall's native language family do not represent different words or sounds with different pitches, so speaking &amp;quot;Doppler effect&amp;quot; with the timing and pitch changes of a real doppler effect of a fast-moving object passing a listener, would be quite jarring and distracting to hear conversationally. Alternatively, he may be stretching out the &amp;quot;p&amp;quot; sound by saying &amp;quot;p-p-p-p&amp;quot;, producing a spitting or {{w|Blowing_a_raspberry|&amp;quot;raspberry&amp;quot;}} sound, which would be highly offensive.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text references the {{w|Doppler effect}}, the change in frequency of a wave when the observer is moving relative to the source. One common example of this is how the sound to a stationary observer of a fast car or airplane starts at a high pitched note but then drops to a low droning noise as it passes. By analogy with the time dilation example, Cueball likely imitates this change in pitch and speed of syllables whenever pronouncing the phrase &amp;quot;Doppler effect&amp;quot; ('Dop-llllerrrr eehfffffeeeehccccctttth'). Languages in Randall's native language family do not represent different words or sounds with different pitches, so speaking &amp;quot;Doppler effect&amp;quot; with the timing and pitch changes of a real doppler effect of a fast-moving object passing a listener, would be quite jarring and distracting to hear conversationally. Alternatively, he may be stretching out the &amp;quot;p&amp;quot; sound by saying &amp;quot;p-p-p-p&amp;quot;, producing a spitting or {{w|Blowing_a_raspberry|&amp;quot;raspberry&amp;quot;}} sound, which would be highly offensive.&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;{{cn}}&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>162.158.174.30</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=363992&amp;oldid=prev</id>
		<title>172.70.90.8: /* Explanation */</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=363992&amp;oldid=prev"/>
				<updated>2025-01-30T09:07:20Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 09:07, 30 January 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l20&quot; &gt;Line 20:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 20:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On average, a stationary muon decays after a bit over {{w|Muon#Muon_Decay|two microseconds}}. While moving at {{w|Muon#Muon_Decay|99.97% of the speed of light}}, their lifespan (from our perspective) stretches to nearly ninety microseconds (a {{w|Lorentz factor}} of ~40.8). If Cueball speaks at four syllables per second (a typical {{w|Speech tempo|speech tempo}} for English), it will take him about half of a second to name the &amp;quot;muons&amp;quot; created in the upper atmosphere; it will take him more than twenty seconds to name the fast-moving &amp;quot;muuuuuoooons.&amp;quot; &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On average, a stationary muon decays after a bit over {{w|Muon#Muon_Decay|two microseconds}}. While moving at {{w|Muon#Muon_Decay|99.97% of the speed of light}}, their lifespan (from our perspective) stretches to nearly ninety microseconds (a {{w|Lorentz factor}} of ~40.8). If Cueball speaks at four syllables per second (a typical {{w|Speech tempo|speech tempo}} for English), it will take him about half of a second to name the &amp;quot;muons&amp;quot; created in the upper atmosphere; it will take him more than twenty seconds to name the fast-moving &amp;quot;muuuuuoooons.&amp;quot; &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text references the {{w|Doppler effect}}, the change in frequency of a wave when the observer is moving relative to the source. One common example of this is how the sound of a fast car or airplane starts at a high pitched note but then drops to a low droning noise as it passes &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;the observer&lt;/del&gt;. By analogy with the time dilation example, Cueball likely imitates this change in pitch and speed of syllables whenever pronouncing the phrase &amp;quot;Doppler effect&amp;quot; ('Dop-llllerrrr eehfffffeeeehccccctttth'). Languages in Randall's native language family do not represent different words or sounds with different pitches, so speaking &amp;quot;Doppler effect&amp;quot; with the timing and pitch changes of a real doppler effect of a fast-moving object passing a listener, would be quite jarring and distracting to hear conversationally. Alternatively, he may be stretching out the &amp;quot;p&amp;quot; sound by saying &amp;quot;p-p-p-p&amp;quot;, producing a spitting or {{w|Blowing_a_raspberry|&amp;quot;raspberry&amp;quot;}} sound, which would be highly offensive.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text references the {{w|Doppler effect}}, the change in frequency of a wave when the observer is moving relative to the source. One common example of this is how the sound &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;to a stationary observer &lt;/ins&gt;of a fast car or airplane starts at a high pitched note but then drops to a low droning noise as it passes. By analogy with the time dilation example, Cueball likely imitates this change in pitch and speed of syllables whenever pronouncing the phrase &amp;quot;Doppler effect&amp;quot; ('Dop-llllerrrr eehfffffeeeehccccctttth'). Languages in Randall's native language family do not represent different words or sounds with different pitches, so speaking &amp;quot;Doppler effect&amp;quot; with the timing and pitch changes of a real doppler effect of a fast-moving object passing a listener, would be quite jarring and distracting to hear conversationally. Alternatively, he may be stretching out the &amp;quot;p&amp;quot; sound by saying &amp;quot;p-p-p-p&amp;quot;, producing a spitting or {{w|Blowing_a_raspberry|&amp;quot;raspberry&amp;quot;}} sound, which would be highly offensive.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>172.70.90.8</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=363991&amp;oldid=prev</id>
		<title>172.71.178.58: /* Explanation */</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=363991&amp;oldid=prev"/>
				<updated>2025-01-30T09:05:19Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 09:05, 30 January 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l14&quot; &gt;Line 14:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 14:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{w|Muon|Muons}} are elementary sub-atomic particles, often released in {{w|air shower (physics)|air showers}} from high-energy {{w|cosmic ray}} protons causing nuclear decay in our upper atmosphere. These protons come from all over the universe from various interstellar events and have energies in excess of anything our species has created. Some of the muons created in these collisions are deflected away from us and decay quickly in the upper atmosphere. Other muons retain the high energy of the colliding protons and travel so fast that they emit {{w|Cherenkov radiation}} from outpacing photons in air, which is used to visualize air showers with telescopes. Muons usually decay very quickly, but because, in part, of {{w|time dilation}} these high-energy muons are able to penetrate densely deep into the earth. They are also used as a natural radiation source, more powerful than x-rays, for internal imaging, especially of large opaque structures.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{w|Muon|Muons}} are elementary sub-atomic particles, often released in {{w|air shower (physics)|air showers}} from high-energy {{w|cosmic ray}} protons causing nuclear decay in our upper atmosphere. These protons come from all over the universe from various interstellar events and have energies in excess of anything our species has created. Some of the muons created in these collisions are deflected away from us and decay quickly in the upper atmosphere. Other muons retain the high energy of the colliding protons and travel so fast that they emit {{w|Cherenkov radiation}} from outpacing photons in air, which is used to visualize air showers with telescopes. Muons usually decay very quickly, but because, in part, of {{w|time dilation}} these high-energy muons are able to penetrate densely deep into the earth. They are also used as a natural radiation source, more powerful than x-rays, for internal imaging, especially of large opaque structures.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Time dilation is the concept from {{w|special relativity}} where faster moving objects travel through time faster than proportional, resulting in an appearance of it slowing down for them &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;to an observer&lt;/del&gt;, as well as an ability to cross greater distances. Because the ‘regular speed’ &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;{{w|Muon|&lt;/del&gt;muons&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;}} &lt;/del&gt;are moving at a relatively normal speed, Cueball pronounces it properly, but because time slows down for the faster moving muons, Cueball adjusts this, and pronounces it much slower, as if he is being slowed down from talking about them.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Time dilation is the concept from {{w|special relativity}} where faster&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;-&lt;/ins&gt;moving objects travel through time faster than proportional, resulting in an appearance &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;to an observer &lt;/ins&gt;of it slowing down for them, as well as an ability to cross greater distances. Because the ‘regular speed’ muons are moving at a relatively normal speed, Cueball pronounces it properly, but because time slows down for the faster moving muons, Cueball adjusts this, and pronounces it much slower, as if he is being slowed down from talking about them.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cueball is implying that when he says &amp;quot;muons&amp;quot;, he is speaking in the same reference frame as them, with time traveling at the same speed for the listener and for the muon. In the same reference frame, muons decay very quickly. He implies that when he says &amp;quot;muuuoooons&amp;quot; very slowly, that he is now speaking in a reference frame where the muons have time dilated relative to the observer and appear to be aging very very slowly. If a relativistic muon were saying its own name, or if Cueball were in the same reference frame as the muon and the observer were not, (and there were a way to transmit sound at relativistic speeds), then the muon might sound like this, stretched out. This is the kind of reference frame in which muons are detected at the surface. We observe them, and we observe that time is passing slower for them than it is for us.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cueball is implying that when he says &amp;quot;muons&amp;quot;, he is speaking in the same reference frame as them, with time traveling at the same speed for the listener and for the muon. In the same reference frame, muons decay very quickly. He implies that when he says &amp;quot;muuuoooons&amp;quot; very slowly, that he is now speaking in a reference frame where the muons have time dilated relative to the observer and appear to be aging very very slowly. If a relativistic muon were saying its own name, or if Cueball were in the same reference frame as the muon and the observer were not, (and there were a way to transmit sound at relativistic speeds), then the muon might sound like this, stretched out. This is the kind of reference frame in which muons are detected at the surface. We observe them, and we observe that time is passing slower for them than it is for us.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>172.71.178.58</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=363990&amp;oldid=prev</id>
		<title>172.71.26.107: /* Explanation */</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3043:_Muons&amp;diff=363990&amp;oldid=prev"/>
				<updated>2025-01-30T09:03:35Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 09:03, 30 January 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l12&quot; &gt;Line 12:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 12:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{incomplete|Created by THE OMG PARTICLE. Do NOT delete this tag too soon.}}&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{incomplete|Created by THE OMG PARTICLE. Do NOT delete this tag too soon.}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{w|Muon|Muons}} are elementary sub-atomic particles, often released in {{w|air shower (physics)|air showers}} from high-energy {{w|cosmic ray}} protons causing nuclear decay in our upper atmosphere. These protons come from all over the universe from various interstellar events and have energies in excess of anything our species has created. Some of the muons created in these collisions are deflected away from us and decay quickly in the upper atmosphere. Other muons retain the high energy of the colliding protons &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;effectively &lt;/del&gt;and travel so fast that they emit {{w|Cherenkov radiation}} from outpacing photons in air, which is used to visualize air showers with telescopes. Muons usually decay very quickly, but in part &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;because &lt;/del&gt;of time dilation these high-energy muons are able to penetrate deep into the earth &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;densely and &lt;/del&gt;are also used as a natural radiation source more powerful than x-rays for internal imaging especially of large opaque structures.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{w|Muon|Muons}} are elementary sub-atomic particles, often released in {{w|air shower (physics)|air showers}} from high-energy {{w|cosmic ray}} protons causing nuclear decay in our upper atmosphere. These protons come from all over the universe from various interstellar events and have energies in excess of anything our species has created. Some of the muons created in these collisions are deflected away from us and decay quickly in the upper atmosphere. Other muons retain the high energy of the colliding protons and travel so fast that they emit {{w|Cherenkov radiation}} from outpacing photons in air, which is used to visualize air showers with telescopes. Muons usually decay very quickly, but &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;because, &lt;/ins&gt;in part&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/ins&gt;of &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;{{w|&lt;/ins&gt;time dilation&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;}} &lt;/ins&gt;these high-energy muons are able to penetrate &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;densely &lt;/ins&gt;deep into the earth&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;. They &lt;/ins&gt;are also used as a natural radiation source&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/ins&gt;more powerful than x-rays&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/ins&gt;for internal imaging&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/ins&gt;especially of large opaque structures.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;{{w|&lt;/del&gt;Time dilation&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;}} &lt;/del&gt;is the concept from {{w|special relativity}} where faster moving objects travel through time faster than proportional, resulting in an appearance of it slowing down for them to an observer, as well as an ability to cross greater distances. Because the ‘regular speed’ {{w|Muon|muons}} are moving at a relatively normal speed, Cueball pronounces it properly, but because time slows down for the faster moving muons, Cueball adjusts this, and pronounces it much slower, as if he is being slowed down from talking about them.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Time dilation is the concept from {{w|special relativity}} where faster moving objects travel through time faster than proportional, resulting in an appearance of it slowing down for them to an observer, as well as an ability to cross greater distances. Because the ‘regular speed’ {{w|Muon|muons}} are moving at a relatively normal speed, Cueball pronounces it properly, but because time slows down for the faster moving muons, Cueball adjusts this, and pronounces it much slower, as if he is being slowed down from talking about them.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cueball is implying that when he says &amp;quot;muons&amp;quot;, he is speaking in the same reference frame as them, with time traveling at the same speed for the listener and for the muon. In the same reference frame, muons decay very quickly. He implies that when he says &amp;quot;muuuoooons&amp;quot; very slowly, that he is now speaking in a reference frame where the muons have time dilated relative to the observer and appear to be aging very very slowly. If a relativistic muon were saying its own name, or if Cueball were in the same reference frame as the muon and the observer were not, (and there were a way to transmit sound at relativistic speeds), then the muon might sound like this, stretched out. This is the kind of reference frame in which muons are detected at the surface. We observe them, and we observe that time is passing slower for them than it is for us.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cueball is implying that when he says &amp;quot;muons&amp;quot;, he is speaking in the same reference frame as them, with time traveling at the same speed for the listener and for the muon. In the same reference frame, muons decay very quickly. He implies that when he says &amp;quot;muuuoooons&amp;quot; very slowly, that he is now speaking in a reference frame where the muons have time dilated relative to the observer and appear to be aging very very slowly. If a relativistic muon were saying its own name, or if Cueball were in the same reference frame as the muon and the observer were not, (and there were a way to transmit sound at relativistic speeds), then the muon might sound like this, stretched out. This is the kind of reference frame in which muons are detected at the surface. We observe them, and we observe that time is passing slower for them than it is for us.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>172.71.26.107</name></author>	</entry>

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