Editing 1733: Solar Spectrum
Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.
The edit can be undone.
Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.
Latest revision | Your text | ||
Line 8: | Line 8: | ||
==Explanation== | ==Explanation== | ||
− | This comic's release day was postponed from the scheduled Wednesday release to a [[:Category:Thursday comics|Thursday release]] because | + | {{incomplete|Examples of such advertisements needed}} |
+ | This comic's release day was postponed from the scheduled Wednesday release to a [[:Category:Thursday comics|Thursday release]] because of the popularity of the previous Monday comic [[1732: Earth Temperature Timeline]]. [[Randall]] even explained this in the header text, see [[1732#Popularity_of_comic|this trivia item from the previous comic]]. | ||
− | This comic depicts the {{w|Fraunhofer lines}} | + | This comic depicts the {{w|Fraunhofer lines}} or "spectral lines", seen when sunlight is split in a spectrometer. These appear as black gaps in the rainbow of light, caused by light being absorbed by elements in the sun. The frequencies of light that an atom absorbs depend on the exact arrangement of electron orbitals around it - because each element has a different pattern of orbitals, each one has a distinctive pattern in the absorption spectrum. The chart shows some of the main lines and identifies the elements linked to them (although it appears to miss hydrogen). The extra lines (including both the labeled and unlabeled ones) seem to correspond to the [http://astro.u-strasbg.fr/~koppen/discharge/silicon.jpg spectrum of silicon], which presumably refers to the {{w|silicon dioxide}} (aka glass) used in the lenses. Of course, this means that the glasses have been ionized and turned into plasma by the heat of the sun. |
− | + | This is a reference to pictures / clipart of the sun wearing sunglasses, often used to denote good weather. The title text is most likely a reference to a specific advert using this image or [https://what-if.xkcd.com/115/ this What If]. | |
− | + | Transitions® is a brand of [//en.wikipedia.org/wiki/Photochromic_lens photochromic] lenses; however, photochromic lenses are often referred to as "transition lenses", so the title text does not necessarily refer to the brand. Photochromic lenses are a type of plastic lens used in prescription spectacles that allow the lens to turn dark when exposed to UV light such as that found in sunlight. The sun choosing to get transition lens would prove a waste of money as the lenses would be permanently transitioned to be dark, so a pair of ordinary sunglasses would likely have proved more cost effective. | |
− | + | ===Labels=== | |
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | === | ||
:This is the official image for {{w|Fraunhofer lines}} (solar spectrum) on Wikipedia: | :This is the official image for {{w|Fraunhofer lines}} (solar spectrum) on Wikipedia: | ||
:[[File:Fraunhofer_lines_From_Wikipedia.png]] | :[[File:Fraunhofer_lines_From_Wikipedia.png]] | ||
− | :The graph is a typical spectral lines chart, with a long rainbow band (from | + | :The graph is a typical spectral lines chart, with a long rainbow band (from deep violet to the left to deep red on the right) with black lines in it, indicating the traces of different elements. |
*In the table below are the official labels from the picture above. If there are no label this is noted with ''none''. | *In the table below are the official labels from the picture above. If there are no label this is noted with ''none''. | ||
**'''Note that they are labeled from right to left!''' | **'''Note that they are labeled from right to left!''' | ||
*Then the element causing the line is mentioned. ''Unlabeled'' is used if the line is not mentioned in the table from Wikipedia. | *Then the element causing the line is mentioned. ''Unlabeled'' is used if the line is not mentioned in the table from Wikipedia. | ||
− | *Then follows the wavelength. It is given with decimals if it is noted in the table from Wikipedia. Else it has been read | + | *Then follows the wavelength. It is given with decimals if it is noted in the table from Wikipedia. Else it has been read of manually from the picture above. |
*Then follows the label given in this comic, with unlabeled meaning that it is not labeled in the comic but still shown. | *Then follows the label given in this comic, with unlabeled meaning that it is not labeled in the comic but still shown. | ||
**If the line is not even included in the xkcd comic "N/A" will be used. | **If the line is not even included in the xkcd comic "N/A" will be used. | ||
Line 49: | Line 39: | ||
|- | |- | ||
|A | |A | ||
− | + | |O<sub>2</sub> | |
|759.370 | |759.370 | ||
|N/A | |N/A | ||
Line 58: | Line 48: | ||
|690 | |690 | ||
|Those giant sunglasses 5 | |Those giant sunglasses 5 | ||
− | |This is the fifth of the five xkcd sunglass lines. This line is not labeled in the picture above. Wavelength read | + | |This is the fifth of the five xkcd sunglass lines. This line is not labeled in the picture above. Wavelength read of manually |
|- | |- | ||
|B | |B | ||
− | |O | + | |O<sub>2</sub> |
|686.719 | |686.719 | ||
|Oxygen 2 | |Oxygen 2 | ||
Line 70: | Line 60: | ||
|577 | |577 | ||
|Those giant sunglasses 4 | |Those giant sunglasses 4 | ||
− | |This is the fourth of the five xkcd sunglass lines. This line is not labeled in the picture above. Wavelength read | + | |This is the fourth of the five xkcd sunglass lines. This line is not labeled in the picture above. Wavelength read of manually. |
|- | |- | ||
|None | |None | ||
Line 76: | Line 66: | ||
|660 | |660 | ||
|Unlabeled | |Unlabeled | ||
− | |This line is not labeled either in the comic or in the picture above. Wavelength read | + | |This line is not labeled either in the comic or in the picture above. Wavelength read of manually. It seems like this one was supposed to be one of the sunglasses lines, and then by mistake the arrow points to the labeled line C below. |
|- | |- | ||
|C | |C | ||
− | |{{w| | + | |{{w|Hα}} |
|656.281 | |656.281 | ||
|Those giant sunglasses 3 | |Those giant sunglasses 3 | ||
− | |This is the third of the five xkcd sunglass lines. This is actually | + | |This is the third of the five xkcd sunglass lines. This is actually a labeled line belonging to the hydrogen Balmer series. Seems like a mistake, and more likely it was meant for the arrow to point to the unlabeled line mentioned here above. |
|- | |- | ||
|None | |None | ||
Line 88: | Line 78: | ||
|645 | |645 | ||
|Those giant sunglasses 2 | |Those giant sunglasses 2 | ||
− | |This is the second of the five xkcd sunglass lines. This line is not labeled in the picture above. Wavelength read | + | |This is the second of the five xkcd sunglass lines. This line is not labeled in the picture above. Wavelength read of manually. |
|- | |- | ||
|a | |a | ||
− | |O | + | |O<sub>2</sub> |
|627.661 | |627.661 | ||
|Oxygen 1 | |Oxygen 1 | ||
Line 100: | Line 90: | ||
|589.592 | |589.592 | ||
|Sodium 2 | |Sodium 2 | ||
− | |Agreement | + | |Agreement |
|- | |- | ||
|D<sub>2</sub> | |D<sub>2</sub> | ||
Line 106: | Line 96: | ||
|588.995 | |588.995 | ||
|Sodium 1 | |Sodium 1 | ||
− | |Agreement | + | |Agreement |
|- | |- | ||
|D<sub>3</sub> or d | |D<sub>3</sub> or d | ||
Line 118: | Line 108: | ||
|577 | |577 | ||
|Those giant sunglasses 1 | |Those giant sunglasses 1 | ||
− | |This is the first of the five xkcd sunglass lines. This line is not labeled in the picture above. Wavelength read | + | |This is the first of the five xkcd sunglass lines. This line is not labeled in the picture above. Wavelength read of manually. |
|- | |- | ||
|None | |None | ||
Line 124: | Line 114: | ||
|554 | |554 | ||
|Unlabeled | |Unlabeled | ||
− | |Agreement. This line is not labeled either in the comic or in the picture above. Wavelength read | + | |Agreement. This line is not labeled either in the comic or in the picture above. Wavelength read of manually. |
|- | |- | ||
|None | |None | ||
Line 130: | Line 120: | ||
|549 | |549 | ||
|Unlabeled | |Unlabeled | ||
− | |Agreement. This line is not labeled either in the comic or in the picture above. Wavelength read | + | |Agreement. This line is not labeled either in the comic or in the picture above. Wavelength read of manually. |
|- | |- | ||
|None | |None | ||
Line 136: | Line 126: | ||
|537 | |537 | ||
|Unlabeled | |Unlabeled | ||
− | |Agreement. This line is not labeled either in the comic or in the picture above. Wavelength read | + | |Agreement. This line is not labeled either in the comic or in the picture above. Wavelength read of manually. |
|- | |- | ||
|E<sub>2</sub> | |E<sub>2</sub> | ||
Line 148: | Line 138: | ||
|518.362 | |518.362 | ||
|Magnesium 2 | |Magnesium 2 | ||
− | |Agreement. See b below | + | |Agreement. See b below. |
|- | |- | ||
|b<sub>2</sub> | |b<sub>2</sub> | ||
Line 166: | Line 156: | ||
|516.733 | |516.733 | ||
|Magnesium 1 | |Magnesium 1 | ||
− | |Agreement. See b above | + | |Agreement. See b above. |
|- | |- | ||
|c | |c | ||
Line 175: | Line 165: | ||
|- | |- | ||
|F | |F | ||
− | | | + | |{{w|Hβ}} |
|486.134 | |486.134 | ||
|Hydrogen 3 | |Hydrogen 3 | ||
− | |Agreement | + | |Agreement. |
|- | |- | ||
|h | |h | ||
Line 199: | Line 189: | ||
|- | |- | ||
|f | |f | ||
− | | | + | |{{w|Hγ}} |
|434.047 | |434.047 | ||
|Hydrogen 2 | |Hydrogen 2 | ||
− | |Agreement | + | |Agreement. |
|- | |- | ||
|G | |G | ||
Line 217: | Line 207: | ||
|- | |- | ||
|h | |h | ||
− | | | + | |{{w|Hδ}} |
|410.175 | |410.175 | ||
|Hydrogen 1 | |Hydrogen 1 | ||
− | |Agreement | + | |Agreement. |
|- | |- | ||
|H | |H | ||
− | |Ca | + | |Ca<sup>+</sup> |
|396.847 | |396.847 | ||
|Calcium 2 | |Calcium 2 | ||
Line 229: | Line 219: | ||
|- | |- | ||
|K | |K | ||
− | |Ca | + | |Ca<sup>+</sup> |
|393.366 | |393.366 | ||
|Calcium 1 | |Calcium 1 | ||
|Agreement. | |Agreement. | ||
|- | |- | ||
− | | | + | |L |
− | | | + | |Fe |
− | | | + | |382.044 |
|N/A | |N/A | ||
− | | | + | |There are more lines outside the visible spectrum which are not even shown in this picture. This one is the last shown towards left and it is not included in the comic. |
|} | |} | ||
Line 246: | Line 236: | ||
:[Above the chart there are four and below the chart there are two labels, each label has one or more arrows pointing to different black lines. The two that has only one arrow points to two close lines marking them both. Only 22 lines are labeled like this, the other 6 are not labeled. The labels in reading order, with the number of arrows noted behind in square brackets:] | :[Above the chart there are four and below the chart there are two labels, each label has one or more arrows pointing to different black lines. The two that has only one arrow points to two close lines marking them both. Only 22 lines are labeled like this, the other 6 are not labeled. The labels in reading order, with the number of arrows noted behind in square brackets:] | ||
− | :Calcium [3] Iron [5] Sodium [1] Oxygen [2] | + | :Calcium [3] |
− | :Hydrogen [3] Magnesium [1] Those giant sunglasses [5] | + | :Iron [5] |
− | + | :Sodium [1] | |
− | + | :Oxygen [2] | |
− | + | :Hydrogen [3] | |
− | + | :Magnesium [1] | |
+ | :Those giant sunglasses [5] | ||
{{comic discussion}} | {{comic discussion}} | ||
− | |||
− | |||
− | |||
− | |||
− |