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Recent comments: {{Special:RecentChanges|namespace=1}}

Latest revision as of 09:33, 16 March 2026

Welcome to the explain xkcd wiki!
We have an explanation for all 3266 xkcd comics, and only 45 (1.4%) are incomplete. Help us finish them!

 Go to this explanation

Latest comic[edit]

Beam Pipe
'If you keep trying to spray your collaborators with the beam when they're not looking, I'm turning off the ion source and NO one will get to play with the beam!' --Physics's mom
Title text: 'If you keep trying to spray your collaborators with the beam when they're not looking, I'm turning off the ion source and NO one will get to play with the beam!' --Physics's mom

    Explanation[edit]

    Ambox warning blue construction.png This is incomplete:
    This page was found with a Physics Nobel Prize. Don't remove this notice too soon. If you can fix this issue, edit the page!

    With pipes such as hosepipes, you can make the water come out in a more rapid and (if done right) more concentrated stream by covering up part of the exit nozzle with your finger (or anything, for that matter). This forces the water to come out of a smaller space, increasing the effect pressure. As the Large Hadron Collider (LHC) can be considered a sort of 'pipe' (a beam pipe, as pointed out in the comic title) this comic makes the ridiculous assumption that the same logic applies there, and its beam can be made stronger by partially covering the hole — something which obviously wouldn't work in real life.[citation needed] In reality, the relativistic particles would not behave as a liquid. It may be that they would annihilate the thumb (or possibly just mildly irradiate it, depending upon intensity) and create a broad spray, instead of narrowing the beam. Although the pipe being open-ended (or partly so, with the thumb half over it) would already have destroyed the vacuum-like conditions necessary to properly maintain the partical beam, without some vacuum-sealing cap or internal bulkhead, which the beam already must have passed through.

    The title text expands the joke, once more treating the LHC as if it were a hosepipe. Making the hose squirt a more intense stream is a common thing for children to do — often to spray family and friends with the pressurized water. This applies the same logic to the LHC, imagining the mother of "Physics" (the science, as opposed to a person) telling off their (presumably adult) child for 'spraying their colleagues with the beam' — something very incomprehensible in real life.

    Transcript[edit]

    Ambox warning green construction.png This is one of 27 incomplete transcripts:
    Don't remove this notice too soon. If you can fix this issue, edit the page!
    [A picture shows a (partly obscured by the panel) particle accelerator (namely this one being the Large Hadron Collider at CERN). Megan is shown on a stepladder, covering the beam pipe with her thumb. Cueball is shown standing behind the ladder, watching.]
    [Caption below the panel:]
    This year's physics Nobel will go to the scientists who figured out that you could make the Large Hadron Collider more powerful by covering part of the beam pipe with your thumb.

    comment.png  Add comment      new topic.png  Create topic (use sparingly)     refresh discuss.png  Refresh 

    Discussion

    Make changes, try things out, or just have fun with the wiki here! Just leave everything above the line alone, please.

    This is a test. PoolloverNathan[stalk the blue seas] 20:48, 16 March 2021 (UTC)

    This is not. —While False (museum | talk | contributions | logs | rights | printable version | page information | what links there | related changes | Google search | current time: 14:47) 18:38, 17 November 2022 (UTC)
    A foreign student asked me to help fight against his math teacher. That was unusual. He was in that class for just a couple of weeks. The teacher's phone number was sent to me. The student asked me to spam-call the teacher. 172.71.155.55 22:58, 18 September 2023 (UTC)

    here i'm just messing around in html, ignore this

    furhhfghure guyrburgryhuyvfr "rvhru"

    interesting way of writing quotations xd

    hmmm this one of putting "<p>" in a line break will come in handy for when i want it to start at the same place than the first line

    Please beware that <p> on mediawiki also disables automatic paragraph breaks, so you need a closing </p> or you'll break automatic paragraph formatting for the rest of the page. Zmatt (talk) 22:06, 31 July 2024 (UTC)

    edit: da hek did that "</div>" come from An user who has no account yet (talk) 14:14, 13 October 2023 (UTC)

    hi uh its hard to get here. is this a reference to undocumented feature??? hmm... this is interesting.
    108.162.241.216 02:05, 23 November 2023 (UTC)

    45px Soup


    45px Soup


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    yum yum [citation needed]

    Hiuiedeixgeyceiyedhcdiedcve {{trout}}

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    <a href=" [AT THE JULY 28TH MEETING][tab] "Cancel the meeting! Our cover is blown."> More testing: hello ​ does​this​work (yes​it​does) This isn't a good name (talk) 22:44, 28 January 2026 (UTC)

    ‮hi 164.58.172.158 14:21, 23 February 2026 (UTC)

    What is this?????????????????????? King Pando (talk) 04:25, 10 March 2026 (UTC)‭

    Hello 107.1.219.44 19:29, 29 April 2026 (UTC)
          comment.png  Add comment
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    Lots of people contribute to make this wiki a success. Many of the recent contributors above have just joined. You can do it too! Create your account here.

    You can read a brief introduction about this wiki at explain xkcd. Feel free to create an account and contribute to the wiki! We need explanations for xkcd comics, characters, What If? articles, and everything in between. If it is referenced in an xkcd comic, it should be here.

    • The incomplete explanations are listed here. Feel free to help out by expanding them!

    Rules[edit]

    Be a jerk!

    There are a lot of comics that have set-in-stone explanations; only put one interpretation in the wiki page for each comic.

    If you want to talk about a specific comic, don’t.

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    11 June 2026

    		 N    14:55 

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