How to Tell Matter From Antimatter | CP Violation & The Ozma Problem

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  • Опубликовано: 25 фев 2020
  • This video was made with the support of the Heising Simons Foundation.
    Support MinutePhysics on Patreon! / minutephysics
    Link to Patreon Supporters: www.minutephysics.com/supporters/
    This video is about the Ozma problem of distinguishing the chirality (ie left-handedness or right-handedness) of matter using weak interaction processes like beta decay (for example in uranium), or neutral kaon/k-meson decay. This is wrapped up in the phenomenon of CP violation, by which charge and parity are both violated by certain weak interaction processes - this enables antimatter to be unambiguously distinguished from matter, and left handed chirality from right handed.
    REFERENCES
    The Ozma Search for Extraterrestrial Intelligence (SETI) Project
    www.seti.org/seti-institute/p...
    Sean Carroll on CP Symmetry (& why we shouldn’t trot out baryogenesis all the time)
    www.preposterousuniverse.com/...
    Electroweak CP Violation on Scholarpedia
    www.scholarpedia.org/article/C...
    The Wu Experiment
    en.wikipedia.org/wiki/Wuexper...
    Martin Gardner, The New Ambidextrous Universe
    books.google.com/books?id=kdL...
    Lecture notes on CP Violation and the CKM Matrix, Cambridge (Mark Thomson)
    www.hep.phy.cam.ac.uk/thomson...
    Homochirality
    en.wikipedia.org/wiki/Homochi...
    L-glucose (vs D-glucose)
    en.wikipedia.org/wiki/L-Glucose
    Radioactive Nucleus Decay
    www.radioactivity.eu.com/site/...
    CP Violation in Semi-Leptonic Decays (SEE PAGE 426 for reference to definition of MATTER)
    www.hep.phy.cam.ac.uk/thomson...
    Kaon Decay Modes
    pdg.lbl.gov/2012/listings/rpp2...
    Flipped bowling Jesus scene in Big Lebowski
    • The Big Lebowski Jesus...
    Isotopes of Uranium
    en.wikipedia.org/wiki/Isotope...
    Beta Decay
    en.wikipedia.org/wiki/Betadecay
    The Wu Experiment
    en.wikipedia.org/wiki/Wuexper...
    Kaons
    en.wikipedia.org/wiki/Kaon
    CP Violation in Symmetry Magazine
    www.symmetrymagazine.org/arti...
    Physics Stack Exchange on CP Violation
    physics.stackexchange.com/que...
    MinutePhysics is on twitter - @minutephysics
    And facebook - / minutephysics
    And Google+ (does anyone use this any more?) - bit.ly/qzEwc6
    Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!
    Created by Henry Reich
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Комментарии • 2,2 тыс.

  • @delqyrus2619
    @delqyrus2619 4 года назад +8532

    I guess this is how we should teach our children what is left and what is right. "Simply build an particle accelerator".

    • @nevanmasterson46
      @nevanmasterson46 4 года назад +489

      me: ah, i can't remember my lefts and rights
      some 5 IQ brainlet: hold up your hands and make an L shape with your finger and thumb
      some 200 IQ alpha: build a particle accelerator each time you forget

    • @xProSkythe
      @xProSkythe 4 года назад +184

      @@nevanmasterson46 dude that L shape is a 300 iq move lol

    • @OrangeC7
      @OrangeC7 4 года назад +71

      @@xProSkythe exactly, whoever thought THAT one up is actually a genius

    • @neopalm2050
      @neopalm2050 4 года назад +67

      @@xProSkythe maybe it is until you realize you can make an L-shape with your right hand too.

    • @tomjackal5708
      @tomjackal5708 4 года назад +67

      "Make an L shape with the back of your left hand"
      problem solved

  • @SchutzmarkeGMBH
    @SchutzmarkeGMBH 4 года назад +3063

    Humans: Turn left
    Anti-Alien: Turns left
    Humans: no no no... the other left.

    • @ah2522
      @ah2522 4 года назад +158

      "No, your left"
      "?????"

    • @Derpster2493
      @Derpster2493 4 года назад +65

      I hope most aliens have at least three hands.

    • @jenschristensen9020
      @jenschristensen9020 4 года назад +133

      "Are we going left?"
      "Right."

    • @CadetGriffin
      @CadetGriffin 4 года назад +42

      @@jenschristensen9020 "I meant right as in correct."

    • @FootLettuce
      @FootLettuce 4 года назад +24

      Just give them the freaking coordinates

  • @Door01
    @Door01 4 года назад +1930

    "simply, build a particle accelerator."

  • @thisjt
    @thisjt 4 года назад +2979

    Me: "turn to the left"
    Alien: turns right
    Me: Jimmy we've discussed this already. Do we have to visit a particle accelerator again?

    • @TheExoplanetsChannel
      @TheExoplanetsChannel 4 года назад +18

      Lol

    • @xlanw4416
      @xlanw4416 4 года назад +5

      😅that's funny.😅

    • @yash1756
      @yash1756 3 года назад +1

      😂😂😂😂gosh the best comment here

    • @Gospel-xm7vd
      @Gospel-xm7vd 3 года назад +28

      Or it could be that they still haven't learned the language properly yet. It's not their fault English is so convoluted

    • @micayahritchie7158
      @micayahritchie7158 Год назад +3

      @@Gospel-xm7vd Pretty sure they wouldn't be using English

  • @adammercer9679
    @adammercer9679 4 года назад +3730

    We're having a hard time finding evidence of alien life in general and MinutePhysics over here is discussing the ramifications of addressing left/right to anti-aliens.

    • @bigsmall246
      @bigsmall246 4 года назад +237

      Well someone's gotta do the forward thinking

    • @TimeFadesMemoryLasts
      @TimeFadesMemoryLasts 4 года назад +128

      That's kind of what theoretical physics is all about. Thinking about problems that might be solvable in the near/distant future.

    • @79Gravity
      @79Gravity 4 года назад

      ye, thats so he doesnt have to have a hard time

    • @Kraflyn
      @Kraflyn 4 года назад +14

      The topic of this video comes from Feynman's Lectures On Physics book. He just copied what he read there, or he just copied what someone else read there. www.feynmanlectures.caltech.edu/I_52.html

    • @Rainaman-
      @Rainaman- 4 года назад +8

      Also, anti-matter aliens? Isn't that far fetched?

  • @takingiteasy17
    @takingiteasy17 4 года назад +603

    I understood the anti-version of this video, so when I watched it my understanding was annihilated

  • @arenacloser7528
    @arenacloser7528 4 года назад +1880

    1:18 "Not knowing left and right could impair intergalactic culinary relations"
    This is of upmost importance.

    • @ragnkja
      @ragnkja 4 года назад +59

      Arena Closer
      And accidentally sending a matter spaceship to an antimatter planet (or vice versa) could cause far more harm to our intergalactic relations.

    • @felipesantana2126
      @felipesantana2126 3 года назад +9

      @@ragnkja bro we don't even know if there are aliens of matter

    • @anthonygarcia5375
      @anthonygarcia5375 3 года назад +1

      Well figuring out if there made of the same matter is more critical figuring out what is life sustaining for each other is important dont want to poison a diplomat for intergalactic peace

    • @HadleyCanine
      @HadleyCanine 3 года назад +9

      Given the cost of shipping inter-galactically, getting our food order right the first time is absolutely critical.

    • @MrAwawe
      @MrAwawe 3 года назад +12

      If they made sweets out of L-glucose and sent them to us they would taste sweet but be completely undigestible to our bodies, essentially being the perfect zero-calorie food.

  • @demonbaned
    @demonbaned 4 года назад +356

    3:57
    "simply build a particle accelerator"
    what a flex

  • @CodingDragon04
    @CodingDragon04 4 года назад +1861

    minutephysics: "simply build a particle accelerator"
    me: ?!

    • @matthewnichols4843
      @matthewnichols4843 4 года назад +2

      I was about to say this...

    • @AlexanderTheTiny
      @AlexanderTheTiny 4 года назад +54

      Well, it's easier than communicating with aliens so far away that we can't tell if they are made of matter or antimatter

    • @SpaceDave-on8uv
      @SpaceDave-on8uv 4 года назад +17

      Very simple, where do you need help?

    • @atlasreign4783
      @atlasreign4783 4 года назад +15

      A microwave oven is technically a molecular accelerator.. Will this work fine enough?

    • @NotASpyReally
      @NotASpyReally 4 года назад +1

      lmao that's what I was going to comment XD

  • @Christoph1990
    @Christoph1990 4 года назад +878

    * Alien visits earth *
    Alien: "Du you know the way to the White House?"
    Human: "Well, do you know kaons...?"

    • @benscott4434
      @benscott4434 2 года назад +20

      im just going to point

    • @Smitology
      @Smitology Год назад

      I mean if they were antimatter aliens, the White House may not exist anymore depending on proximity.
      And if they were just made of matter (which is easily tested by the fact that they have safely landed on Earth) you can use good old uranium decay to explain instead
      Also I just realised that if they're physically on Earth, the old fashioned "pointing in the correct direction" may be the way to go

    • @Neuro_nActivation
      @Neuro_nActivation 4 месяца назад +8

      "shit, they're getting clever now" *bombs earth*

    • @admiraloscar3320
      @admiraloscar3320 4 месяца назад

      If they didn’t blow up already, they could use the uranium method

  • @datavalisofficial8730
    @datavalisofficial8730 4 года назад +782

    "So you guys just have to look at the 20.1% decay"
    "Oh.. got it! 1.02% thanks!"

    • @MugilanBaskaran
      @MugilanBaskaran 4 года назад +48

      when he says 1.02% then you'd interpret it as 20.1% only because you wouldn't be able to tell the difference, his speech would also flip

    • @matthewgasparin7000
      @matthewgasparin7000 4 года назад +21

      @@MugilanBaskaran thanks Captain Obvious.

    • @wargsbl7858
      @wargsbl7858 3 года назад

      Thanks for the explanation!

    • @ankitdubey9310
      @ankitdubey9310 2 года назад

      underrated

    • @assholable
      @assholable 2 года назад

      Hahahahah

  • @Fiyaaaahh
    @Fiyaaaahh 4 года назад +203

    "Simply build a particle accelerator" Can I get one at Ikea? And how many part(ticle)s does it consist of? Must be one hell of manual.

    • @lukefreeman828
      @lukefreeman828 4 года назад +12

      Fiyaaah just buy a desktop particle accelerator aka a CRT screen.

    • @nickolson-harris9272
      @nickolson-harris9272 4 года назад +6

      You can get it at πkea. ruclips.net/video/II8d__AH7EI/видео.html

    • @LittleWhole
      @LittleWhole 4 года назад +2

      Nick Olson-Harris r/angryupvote

    • @kahlzun
      @kahlzun 3 года назад +1

      @@lukefreeman828 does it shoot neutral kaons?

    • @Titanic-wo6bq
      @Titanic-wo6bq 3 года назад

      Maybe at the infinite one.

  • @mattwinward3168
    @mattwinward3168 4 года назад +1418

    _"Everything mirrors perfectly except for this one thing"_
    ...
    ...
    ....why....?

    • @Originalimoc
      @Originalimoc 4 года назад +15

      That's what a mirror essentially is.

    • @geekjokes8458
      @geekjokes8458 4 года назад +160

      WE HAVE NO IDEA (i think... none of my professors would explain, but then again im just an undergrad)

    • @Cashman9111
      @Cashman9111 4 года назад +124

      why can't everything be 100% perfect ? the universe is so annoying

    • @Quantanaut
      @Quantanaut 4 года назад +441

      Because there is a larger symmetry that is preserved, we think. It's called CPT symmetry, meaning that if you took the mirror image, flipped the charge, and ran the experiment backwards in time, it would look identical again.
      Often times, a broken symmetry on one level hints at another symmetry that is preserved on a deeper level.

    • @zukodude487987
      @zukodude487987 4 года назад +8

      Why? Or do you mean how?

  • @holz_name
    @holz_name 4 года назад +226

    I don't think we have ever produced an antimatter uranium atom. So, it's a prediction that anti U-239 would produce right handed anti-electrons that needs to be tested and verified, not a fact. That's important, after all, the CP-symmetry violation was a shock for physicists in the 1960s.

    • @STARDRIVE
      @STARDRIVE 4 года назад +50

      Excellent logic. When it comes to atoms, they only managed to create antimatter hydrogen and helium. These two elements only have a core-spin, which is easy to counter.
      If anyone states there are other anti elements than those two, I love to see a link to the source.

    • @sudazima
      @sudazima Год назад +4

      actually particle accelerators easily have high enough energy to have create very short lived anti-uranium particles in principle.

    • @mastershooter64
      @mastershooter64 Год назад +26

      @@sudazima Source: just trust me bro

    • @sudazima
      @sudazima Год назад +4

      @@mastershooter64 its not that hard.. LHC energy is ~14TeV a U-235 atom takes about 235GeV. E=MC^2

    • @thibautperami2743
      @thibautperami2743 Год назад +41

      @@sudazima That is true for elementary particles, but for a complex particule composed of hundred of other simpler particules the probability that it will spontaneously create itself is abismally small. If you convert 235Gev of energy into matter it is extremely more likely to not be a U-235 than to be a U-235

  • @caesarcch3879
    @caesarcch3879 4 года назад +648

    7 year old me: Mom how to distinguish left from right?
    Mom who also happens to be a physicist: Just build a particle accelerator...

    • @micahphilson
      @micahphilson 4 года назад +14

      At 7 years old, you asked your mom how to "distinguish left from right"?
      What, are you Captain Holt?

    • @varunvaijnath1262
      @varunvaijnath1262 3 года назад +1

      😂😂

  • @Boss-_
    @Boss-_ 4 года назад +133

    Perfect. Now that I know how to tell matter from antimatter, I'll never run the risk of accidentally annihilating myself, so long as I have a FRIKIN PARTICLE ACCELERATOR IN MY POCKET!

    • @lucasriddle3431
      @lucasriddle3431 3 года назад +7

      No, you need a sentient creature made of antimatter, and a way to communicate with it, to test it for you. And if it's actually normal-matter, it won't go too well for them.

    • @Sollace
      @Sollace 3 года назад +3

      *Pocket Accelerators
      I'm sure I saw one of those in stock at Target...

  • @MagnusMoerkoereJohannesen
    @MagnusMoerkoereJohannesen 4 года назад +2048

    God might play dice, but he's really particular about his chirality, it seems.

    • @DavidGuild
      @DavidGuild 4 года назад +200

      Einstein would roll over in his grave. Not only does God play dice, the dice are chiral!

    • @JoeTaber
      @JoeTaber 4 года назад +326

      Yes but does Einstein roll in his grave to the left or to the right?

    • @ka-50withsaams36
      @ka-50withsaams36 4 года назад +169

      @@JoeTaber Well, it could be both at the same time unless you look. Aka Schrödinger's dead Einstein paradox.

    • @tim40gabby25
      @tim40gabby25 4 года назад +43

      Only an antimatter Einstein could roll in his grave, as his number's already up - not that that matters.

    • @renerpho
      @renerpho 4 года назад +2

      God doesn't play dice. ruclips.net/video/r1bDSlt1n9M/видео.html&t=2445

  • @SnydeX9
    @SnydeX9 4 года назад +1697

    "Enter the K-on."
    And thus, moe was scientifically proven.

    • @Originalimoc
      @Originalimoc 4 года назад +22

      😂😂😂😂😂TOTALLY UNEXPECTED

    • @Khaleb_0
      @Khaleb_0 4 года назад +43

      Digibro is proud

    • @Anklejbiter
      @Anklejbiter 4 года назад +52

      Glad I'm not the only one who heard Keion/K-on.

    • @Supernov4
      @Supernov4 4 года назад +41

      moe moe KYUN!

    • @binky2819
      @binky2819 4 года назад +8

      _No, thank you_

  • @AeroQC
    @AeroQC 4 года назад +558

    *Scientist A:* _"Do you know what's the difference between Matter and Anti-matter?"_
    *Scientist B:* *shrugs *
    *Scientist A:* _"Neither do I, but it doesn't matter."_

  • @uWu-fp2lc
    @uWu-fp2lc 4 года назад +106

    Whenever I feel burnt out and feel like science has become tiring, minute physics seems to always pull me back in
    His explanation and his videos make me feel at home (at my sciencey home)
    Just sharing

    • @VanquishR
      @VanquishR 3 года назад

      Ah yes, simply build a particle accelerator :)

  • @KuruGDI
    @KuruGDI 4 года назад +252

    1:01 I wish the text would stay longer in the window. I don't mind hit pause while watching the video, but it would be nice to have a longer timespan to actually be able to hit pause.

    • @FyneappleJuice
      @FyneappleJuice 4 года назад +46

      If you're on PC, you can use . and , for advancing frame by frame.

    • @KuruGDI
      @KuruGDI 4 года назад +16

      @@FyneappleJuice Nice! I dodn't know that. Thank you! Still very short text though :/

    • @LA-MJ
      @LA-MJ 4 года назад +25

      Really annoying on mobile

    • @KuruGDI
      @KuruGDI 4 года назад +2

      @@LA-MJ Also a good argument. I never even thought about that

    • @GelidGanef
      @GelidGanef 4 года назад +30

      The first one was annoying. The second one at 3:14, flashing for less than half a second, exactly as Henry said the phrase "fast decaying," felt like some kind of cruel joke on the text-reading-completionist pause-ninjas of youtube.

  • @mindlessreader1595
    @mindlessreader1595 4 года назад +162

    When minutephysics starts talking about K-On!

    • @SeriousApache
      @SeriousApache 4 года назад +15

      When Minutephysics starts talking about CP Violation...

    • @Dougy
      @Dougy 3 года назад +3

      I like sushi

  • @GrEEnEyE089
    @GrEEnEyE089 4 года назад +118

    Hypothetically, when signalling aliens, you could polarize the carrier signal and use that as a reference for clockwise or counterclockwise and thus left and right

    • @danieldiaz5342
      @danieldiaz5342 4 года назад +23

      You would have to tell how to measure this polarization tho, should you measure from the electric field towards the magnetic field or the other way around? What if their standard for electric field has the opposite sign? So it's the same problem all over again (I think)

    • @noobpro9759
      @noobpro9759 4 года назад +26

      It's not so much about how to give specific signals for left and right but how define the very nature of left vs right.
      Kind of like I could tell you my hair is blonde but if you don't know what color is it doesn't really make any sense.

    • @BastiatC
      @BastiatC 4 года назад +2

      Or just refer to the rotational direction of the Galaxy(using the nearest galaxy as a reference for deciding which way is "up")

    • @noobpro9759
      @noobpro9759 4 года назад +8

      @@BastiatC 🤦‍♂️there are so many things wrong with that.
      A. what if they are a race without eyes
      B. The first picture of earth was upside down when taken. Who's to say they wont do the same with said galaxy.
      C. If they already have a preconceived notion of left and right who's to say they won't see said upside down picture and end up sending their responses in the complete opposite direction due to said confusion?

    • @j.21
      @j.21 4 года назад

      Why are you here? I'm familiar with that profile pic.

  • @redxeth
    @redxeth 2 года назад +4

    This reminds me of a story Feynman told in his 1964 Cornell lecture series on the same connundrum (Symmetry of Physical Law). He didn't call it the Ozma paradox or present a solution, but the way he tells it is so great.

  • @issou9253
    @issou9253 4 года назад +241

    What i came here for: The Ozma Problem
    What i understood: 🅰🅽🆃🅸 - 🅰🅻🅸🅴🅽🆂

    • @christianheichel
      @christianheichel 4 года назад +10

      Wouldn't an anti-alien by definition be human? lol anti=not alien=alien........so not alien?

    • @kellynolen498
      @kellynolen498 4 года назад +9

      @@christianheichel well yes, but technically no

    • @jonathanodude6660
      @jonathanodude6660 4 года назад

      Chris Heichel well it's a shorthand for antimatter aliens so technically you're correct but it's also not what we're talking about

    • @KaiserMattTygore927
      @KaiserMattTygore927 4 года назад

      @@christianheichel I mean.. maybe anti-humans from Anti-Earth, or are WE the Anti-aliens to them?

    • @christianheichel
      @christianheichel 4 года назад

      @@KaiserMattTygore927 (imitates explosion sound) mind blown lol I was originally just saying that to be funny with a play on words.

  • @IcyyDicy
    @IcyyDicy 4 года назад +75

    "Simply build a particle accelerator" -MinutePhysics 2020

  • @stillbroke9063
    @stillbroke9063 Год назад +4

    I was looking for Civil Protection Violation, that one song but this is cool too.

  • @calsavestheworld
    @calsavestheworld 4 года назад +141

    "What's antimatter?"
    "It doesn't matter."
    "Yes it does. I want to know."
    "know what?"
    "Antimatter."
    "what about it?"
    "I don't see."
    "That's right."
    "What's right."
    "No matter."

  • @brandoncarter3042
    @brandoncarter3042 4 года назад +10

    The topics you talk about are always about something big yet some how you never fail to explain it in a simple and easy way to understand. Thank you so much.

  • @laiag4854
    @laiag4854 4 года назад +220

    "Simply build a particle accelerator" want a coffee with it?

    • @sam93931
      @sam93931 4 года назад +8

      1 sugar plz

    • @jojoiv
      @jojoiv 4 года назад +11

      @@sam93931 normal or anti sugar?

    • @sam93931
      @sam93931 4 года назад +9

      @@jojoiv hmmm. good question, depends of the coffee I guess, i don,t want it to explode in my face =0

    • @jonathanouyang
      @jonathanouyang 4 года назад

      @@sam93931 Explode with the force of a couple nuclear bombs

    • @sam93931
      @sam93931 4 года назад +7

      @@jonathanouyang So I assume this is a strong coffee?

  • @drval01
    @drval01 3 года назад +6

    This is a tremendous "explainer" video on CP violation. Thank you!

  • @dumpeeplarfunny
    @dumpeeplarfunny Год назад +5

    On a half related topic: trying to define left and right leads to an interesting concept: rotational directions. We only have names for 2 rotational directions, on the XY axis. I'd say XZ rotation is leftwise and rightwise, and YZ rotation is forwise and backwise.

  • @scarlas7071
    @scarlas7071 4 года назад +31

    How do we know about the way anti-uranium decays? The largest anti-nuclei created so far as far as I'm aware are anti-helium.

    • @garethdean6382
      @garethdean6382 4 года назад +15

      We don't, not directly. But we DO know what happens when antiparticles decay and across the board we see that the chirality, the 'handedness'of their particles is the exact opposite of their matter decays. So unless anti-uranium behaves differently for some utterly unknown reason then it *should* decay the way shown in the video.

    • @jonathanouyang
      @jonathanouyang 4 года назад +2

      @@garethdean6382 CPT symmetry violation?

    • @scarlas7071
      @scarlas7071 4 года назад +3

      @@garethdean6382 I see. The long-lived neutral kaon does seem to be an exception, though. Is there any reason why the uranium nucleus couldn't be an exception in the same way?

    • @kkmardigrce
      @kkmardigrce 4 года назад

      Thanks for asking, I was thinking of this myself. Also I thank Gareth for the answer.

    • @wurttmapper2200
      @wurttmapper2200 4 года назад +2

      Because we know how their constituents decay. There is a very good reason why kaons decay how they do, it is because there are intermediaries.

  • @TheRealGuywithoutaMustache
    @TheRealGuywithoutaMustache 4 года назад +21

    *simply*
    Build a particle accelerator. Hold up, let me call Stark Industries.

    • @cringe5393
      @cringe5393 2 года назад +1

      @Hand Grabbing Fruits shower in this ratio

  • @whimbur
    @whimbur Год назад +11

    I like to think that there isn't actually a difference between the amount of anti-matter and matter particles in the universe, but rather the observable universe just happens to be in an area almost entirely made of up matter, and that there are also places made up almost entirely of antimatter, similar but opposite to us.

    • @Hudoi-1
      @Hudoi-1 Год назад +1

      But that would violate the... I forgor 💀

  • @Spiarmf
    @Spiarmf 4 года назад +20

    "Simply build a particle accelerator.."
    Sounds easy enough

  • @cg1906
    @cg1906 4 года назад +193

    Counterpoint: I'm never going to ask someone made of antimatter to make me pie so i guess you could say this problem doesn't....
    Matter

    • @Kartoffelkamm
      @Kartoffelkamm 4 года назад +17

      So you're not going to share your favorite recipes with them? Rude.
      I mean, anti-wheat behaves the same was as wheat, for example, so they could bake an anti-cheesecake and it'd taste the same as a regular cheesecake.
      Also, then we could find out whether or not eating cheesecake makes them explode.

    • @cg1906
      @cg1906 4 года назад +4

      @@Kartoffelkamm what happens when the antimatter cheesecake interacts with your matter mouth my friend

    • @pbj4184
      @pbj4184 4 года назад +8

      @@cg1906 A noble sacrifice made for the greater good :)

    • @cg1906
      @cg1906 4 года назад +1

      @@pbj4184 yknow what. Good point 😂

    • @Harshhaze
      @Harshhaze 4 года назад +2

      We could nuke their entire universe by sending matter from our universe to them. We just need to make sure they don't have enough time to respond in kind...

  • @davidsquires9106
    @davidsquires9106 4 года назад +88

    What if the opposite-handed anti-aliens were also moving backward in time?

    • @antarctiqk
      @antarctiqk 4 года назад +1

      they would be opposite-handed aliens

    • @Smitology
      @Smitology Год назад +23

      Wouldn't you notice entropy and stuff? Time reversal is one of those things where you certainly CAN tell which one is normal and which one is not due to entropy.

    • @plopsmcgee9672
      @plopsmcgee9672 Год назад +6

      @@Smitology That depends. People say that entropy always increases as you travel forward in time, but that's not inherent. Rather that's due to the low entropy conditions at the specific point in time that is the big bang. I like to phrase it as "entropy always increases moving away from fixed points." This means that if the aliens were on the "other side" of the big bang moving back in time, (assuming physics is truly reversible) then entropy wouldn't help.

    • @gdclemo
      @gdclemo 4 месяца назад +1

      If the aliens were moving backward in time then any communication between them would look like it was travelling backward in time to us, which is the same as sender and receiver being swapped. So the stream of particles encoding their reply would have to be moving backwards in time too... so it would look to us as if their reply was travelling from us to them and not the other way round, and the same for them. OK I really have no idea how that would work, if at all.

    • @NotMe6044
      @NotMe6044 3 месяца назад

      Then we might have to rethink the tenets of our communication

  • @ziaoji
    @ziaoji 4 года назад +3

    Just as I think I figured out how the universe works, you come to offer a new point of view. You always explain something high above in the most intuitive way.

  • @johnweb7055
    @johnweb7055 11 месяцев назад +1

    This issue has bounced around in my head since AP physics, 33 years ago. Thank you. I can rest now.

  • @TAnders877
    @TAnders877 4 года назад +74

    Who tried to rub the spot on his paper off your screen? Lol

    • @AthAthanasius
      @AthAthanasius 4 года назад +1

      Not this time, but I was convinced I needed to clean my monitor due to it sometime during the last month.

  • @Cats2Fat
    @Cats2Fat 4 года назад +15

    1:03 Potential impact on Intergalactic culinary relations 😹😹😹👍🏻💯

  • @AfroJeffrey
    @AfroJeffrey 4 года назад

    So, minute physics is now making more than a minute physics. Awesome. :)

  • @codigany2705
    @codigany2705 4 года назад +53

    The fact that he didn’t say positron but said anti-electron bothers me.

    • @Uyhn26
      @Uyhn26 4 года назад +9

      CodiganY Technically his is more accurate. I mean, we don’t exactly call electrons “negatron”.

    • @staglomagnifico5711
      @staglomagnifico5711 4 года назад +22

      @@Uyhn26 Why *don't* we call electrons "negatrons"?

    • @efhi
      @efhi 4 года назад +8

      @@Uyhn26 It's sounds really cool.

    • @Uyhn26
      @Uyhn26 4 года назад +3

      Staglo Magnifico Chronicle reason.

    • @pedronunes3063
      @pedronunes3063 3 года назад

      @@Uyhn26 Anti-protons should be called netrons

  • @m.t1446
    @m.t1446 4 года назад +9

    I was in the 7th grade when I first saw one of your vids. Righ now I'm in my last year of college. Your videos still bring me that sense of nostalgia ❤️

    • @lakshaygupta9061
      @lakshaygupta9061 4 года назад +2

      Are you majoring in physics ?

    • @m.t1446
      @m.t1446 4 года назад +2

      @@lakshaygupta9061 Technically no but most of the lab work I do evolves a lot a chemistry and physics sooo it's a yes no 😂 depends on what I ultimately choose for my masters and doctors degree.

    • @lakshaygupta9061
      @lakshaygupta9061 4 года назад +1

      @@m.t1446 well best of luck for your future mate

  • @navarajpanday68
    @navarajpanday68 4 года назад +167

    Last time i was this early the internet provider were defying math

    • @Zedryx69
      @Zedryx69 4 года назад +2

      hey, I saw that video!

    • @anjishnu8643
      @anjishnu8643 4 года назад

      and youtube was defying logic

  • @Great_Rising_Sun
    @Great_Rising_Sun 4 года назад

    really the best physics channel

  • @yoavboaz1078
    @yoavboaz1078 3 года назад +1

    dear Henry, it's been 11 months since you made a video that's actually about physics, we miss it

  • @QuarterLifeCrises
    @QuarterLifeCrises 4 года назад +23

    0:23 I always thought the writing behind McGonagall was in Ancient Runes. Never knew it was mirrored. Huh.

    • @feynstein1004
      @feynstein1004 4 года назад +5

      Fun fact: Runes are quite easy to distinguish. Since they were generally carved on wood, it was much easier to carve straight lines than curves. That's why runes consist almost entirely of straight lines, unlike modern alphabets.

    • @QuarterLifeCrises
      @QuarterLifeCrises 4 года назад +3

      @@feynstein1004 at a glance they always looked like straight lines to me (never paid it too much attention, and never up close in HD). That's why I thought they were runes. Or at least the prop departments attempt at being "magical".

    • @feynstein1004
      @feynstein1004 4 года назад

      @Harika Mohan You should watch Everything Wrong with Chamber of Secrets by CinemaSins lol

    • @QuarterLifeCrises
      @QuarterLifeCrises 4 года назад +1

      @@feynstein1004 yeah, should have known Jeremy would have caught it :D

  • @zteak1066
    @zteak1066 4 года назад +24

    Ah yes how do I tell the alien I am talking to how to bake my favorite cookies

    • @ragnkja
      @ragnkja 4 года назад

      Zteak10
      For once, it actually makes sense to say “dextrose” rather than “glucose”.

  • @navidmahabadi4568
    @navidmahabadi4568 4 года назад

    Great videos, short and sweet

  • @namanchhibbbar2205
    @namanchhibbbar2205 3 года назад +1

    your channel is amazing

  • @kidsea13
    @kidsea13 4 года назад +42

    "Enter the keion"
    Yui saves the day once again

  • @zeppie_
    @zeppie_ 4 года назад +131

    Who would've thought that anime girls could help us communicate with aliens

  • @softyzz69
    @softyzz69 4 года назад

    Enjoy ur vids alot thanks for making them

  • @kylersander4793
    @kylersander4793 4 года назад

    This is so interesting!! I want to know more!

  • @Beelzejoy
    @Beelzejoy 4 года назад +23

    "you definitely dont wanna shake EITHER hand of an alien made of anti matter".... love it dude, love it i cant stop laughing🤣

  • @sleepCircle
    @sleepCircle 4 года назад +52

    This feels a little like an orientation video for SCP foundation employees.

    • @dydlus
      @dydlus 3 года назад +8

      "In the event of a [REDACTED]-class `Outer-space Entity` scenario, the MINPHYS Protocol will be enacted. As part of the protocol, all level 3 or higher personel will be provided with kaon-based devices used to distinguish:
      -matter from antimatter;
      -the universally agreed-upon directions "left" and "right" from eachother.
      Personel are under no circumstance to make physical contact with any foreign entity until it is established whether or not it is made of antimatter."

    • @themushroominside6540
      @themushroominside6540 3 года назад

      Find the antimatter mirror of the SCP Foundation and contact them so that an elimination experiment can be co-conducted against SCP 682 and its mirror counterpart in which each SCP 682 will be forced to contact one another in the attempt to obliterate one another's matter resulting in a perfect release of energy that can be harnessed by both Matter SCP and Antimatter SCP foundations.

    • @picorduri
      @picorduri Месяц назад

      one of the biggest challenges in studying anti-atoms is containment, after all...

  • @ezragrimes6716
    @ezragrimes6716 4 года назад

    Good thing you made this video, I thought I'd have to explain this to my family, because of course I could. Good save.

  • @souharda9829
    @souharda9829 3 года назад +1

    I LOVE THIS CHANNEL

  • @billeast1984
    @billeast1984 4 года назад +22

    I find it amusing that this video avoids words like chirality and positrons when that is exactly what it is talking about.

    • @struppi441
      @struppi441 4 года назад +7

      Probs because it's easier to understand

  • @bingbongjoel6581
    @bingbongjoel6581 4 года назад +10

    3:14 Light Music Club?
    Hehe :3

  • @mukrifachri
    @mukrifachri 4 года назад

    I always enjoy your drawing !

  • @earthianprithviwasi
    @earthianprithviwasi 3 года назад

    This video was so educational

  • @jojogape
    @jojogape 4 года назад +42

    3:14 Enter the K-On!
    *Digibro would like to know your location*

    • @ObjectsInMotion
      @ObjectsInMotion 4 года назад +9

      Hm, I searched “K-On, CP, violation” and got something completely different.... hey are those sirens outside?

    • @jojogape
      @jojogape 4 года назад +2

      @@ObjectsInMotion just as i read this comment i heard sirens. witchcraft.

  • @wwrite7370
    @wwrite7370 4 года назад +3

    Lal, for me it's the first video to call the CPT violation a good thing.

    • @atimholt
      @atimholt 4 года назад

      Aren’t we desperately searching for unexplainable things all the time, in order to get a broader set of data to build our next physical theory on? The more, varied disproof you have, the better.

    • @wwrite7370
      @wwrite7370 4 года назад

      @@atimholt true :)

  • @jansenonline
    @jansenonline 4 года назад

    This is the ultimate solution without a problem :) I like it.

  • @Nightcrawler333
    @Nightcrawler333 4 года назад

    Thanks for this nice video 👍

  • @wasup1193
    @wasup1193 4 года назад +3

    thanks youtube, i needed to know this for...
    science and...stuff

  • @Bean_Soup
    @Bean_Soup 4 года назад +48

    Me watching this video:
    “Ok i get it.”
    “Ok i get it...”
    “Nevermind”

  • @ratatataraxia
    @ratatataraxia 4 года назад +2

    Great, now I have to spend about ten hours thinking about this.

  • @TheStarsphere
    @TheStarsphere 4 года назад +1

    Please do a video on the strong CP problem! :)

  • @Legatron17
    @Legatron17 4 года назад +29

    am i the only one who was thinking of CP Violation from HL2?

    • @lereff1382
      @lereff1382 4 года назад +11

      CP Violation in HL2 works both because of the CP Violation discussed in this video AND because it's short for Civil Protection Violation.

    • @downy_d0lphin_248
      @downy_d0lphin_248 4 года назад +3

      I came to look for this specific comment about hl2

    • @jonathanouyang
      @jonathanouyang 4 года назад +1

      I knew CP Violation from my research, dont know about HL2

    • @thequantum0
      @thequantum0 3 года назад

      @Eric Lee ?

    • @jonathanouyang
      @jonathanouyang 3 года назад

      @Eric Lee ?

  • @thewarriorofboros
    @thewarriorofboros 4 года назад +21

    Can't believe that one anime about cute girls doing music things is the solution to an intergalactic communication problem

  • @dragosginghina5625
    @dragosginghina5625 4 года назад

    This is so far above what my brain was prepared to try to understand

  • @Genaral_Doom
    @Genaral_Doom 4 года назад

    been watching for awhile... are you a teacher? you explain things really well

  • @deetheottsel
    @deetheottsel 2 года назад +4

    I was looking for CP violation from half life 2, but I learned about this instead

  • @nixel1324
    @nixel1324 4 года назад +8

    At the pi-timestamp: not to be confused with the K-On!

  • @HolyFire37F
    @HolyFire37F 4 года назад

    When I was much younger, the way I remembered what "Left" is was "The general direction you need to run towards in Zillion after issuing the destroy base command on the mainframe".
    If only I had back then a particle accelerator and the knowledge presented in this video...

  • @bigdave6952
    @bigdave6952 3 года назад

    CP violation measurements were a part of my master thesis

  • @vibaj16
    @vibaj16 Год назад +5

    I think the fact that we could communicate at all would mean that we must have been able to solve similarly hard problems for defining our words
    Also TIL that CP Violation is another title of something in Half Life that is actually a real physics thing

  • @thejoshhartley
    @thejoshhartley 4 года назад +21

    Alien: which direction is left?
    Humans: You see Mars? Thats to the left of us

    • @natecummins9962
      @natecummins9962 4 года назад +3

      you have to mention in relativity to something like the sun or it could be on the right.

    • @Fiyaaaahh
      @Fiyaaaahh 4 года назад

      @@natecummins9962 Actually it depends on a point of reference, the position of the observer looking at that reference point, and the orientation of the observer (+ a notion of up/down/left/right) in order to fully describe what "left of something" means.

    • @natecummins9962
      @natecummins9962 4 года назад

      Fiyaaah fucking Albert Einstein over here

  • @ryo200114
    @ryo200114 4 года назад

    Wooow, this video is awsome!

  • @jidhindharanm.p9351
    @jidhindharanm.p9351 4 года назад

    For someone writing a fiction around antimatter civilisation.. .this was most helpful!

  • @Katt1n
    @Katt1n 3 года назад +3

    Got my particle accelerator, which way should i turn the screws to assemble it?

  • @pougetguillaume4632
    @pougetguillaume4632 4 года назад +4

    Minute physics: simply build a particule accelerator
    Me: instructions unclear watched K-on!

  • @ishab.6798
    @ishab.6798 4 года назад

    I am impressed by all the small things in the universe humans have learned so many facts about. Like the probability of tiny things decaying into other tiny things.

  • @MacroAggressor
    @MacroAggressor Год назад

    Interesting solutions to problems I never knew existed ;D

  • @ShudoukenTV
    @ShudoukenTV 4 года назад +12

    K-On! gang, assemble. My favorite is Mio. Whether mirrored or anti-matter, doesn't matter.

  • @TheScienceBiome
    @TheScienceBiome 4 года назад +5

    I’m torn between my love for this channel and wonderful-ness of the name “Ozma”

    • @DFPercush
      @DFPercush 4 года назад +6

      Ozma is also boss in Final Fantasy 13/14, and it looks like.... a mirror, actually. A shape shifting mirror that drags you into another dimension. Who knew...

    • @danielf3623
      @danielf3623 4 года назад +2

      My sister dressed up as Ozma for Halloween when she was 8. She was so obsessed with the Oz books and *so mad* when nobody knew who she was.

    • @MegaIceNine
      @MegaIceNine 4 года назад +3

      @@DFPercush It was in FF9 first, appearing as the Giant Magical Marble of DOOM!

  • @chadjones1266
    @chadjones1266 3 месяца назад

    Thanks again

  • @willbateman-hemphill3277
    @willbateman-hemphill3277 4 года назад

    Tres cool vid!

  • @Spooky_Sunday
    @Spooky_Sunday 4 года назад +27

    Addendum: The aliens have an antimatter Samuel R. Jackson.

    • @dibbidydoo4318
      @dibbidydoo4318 4 года назад

      Jackuel R. Samson.

    • @FalloutJack
      @FalloutJack 4 года назад

      @@dibbidydoo4318 Same place musta' given us Ton Jravolta in that one episode of Space Dandy.

    • @NETkoholik
      @NETkoholik 4 года назад

      If you think about it there must be a L. Kelly lurking somewhere in the cosmos.. ..but I'm willing to bet it's in the US..

    • @dotwarner17
      @dotwarner17 3 года назад

      @@NETkoholik Wouldn't anti-chiral R. Kelly by L. Kerry? :P

  • @hiccup3.14
    @hiccup3.14 4 года назад +5

    How do we produce a mirror image experiment?
    How do we find a uranium nucleus which is mirrored?
    And where will the antimatter aliens live?
    A void?

    • @garethdean6382
      @garethdean6382 4 года назад +1

      Many nuclei have an intrinsic 'spin' to them which can be aligned or anti-aligned with magnetic field. This allows you to turn nuclei into spinning tops of a sort which can be pointed in mirror directions.
      But as for anti-aliens? Well yeah, probably not that likely.

    • @SocialDownclimber
      @SocialDownclimber 4 года назад +1

      Umm we also live in a void. So yeah, a void is a totally plausible place for antimatter aliens to live.

    • @gammarayneutrino8413
      @gammarayneutrino8413 4 года назад +1

      @@SocialDownclimber We don't live in a void though. There are atoms in space, like hydrogen. There's also energy but that's not important to the discussion.

  • @tyler2854
    @tyler2854 4 года назад +1

    Well, you could say that your right hand is the hand that comes first if you were to start at your back and rotate around your body counter clockwise relative to a clock flipped to the horizontal with its face facing up or facing towards your head positioned at your waist.

  • @ankitdubey9310
    @ankitdubey9310 2 года назад

    just lovely

  • @asailijhijr
    @asailijhijr 4 года назад +3

    20.1% vs 20.3%? Is that a significant difference?
    What is the likelihood that that difference arises instead from chance? How many experiments have been performed in human history? What portion of them are the ones that give is this difference in numbers?

    • @bigsmall246
      @bigsmall246 4 года назад

      Probably all of the experiments gave the same result. 0.2% is a huge difference. It is not small.

    • @Dom-Nom-Nom
      @Dom-Nom-Nom 4 года назад

      The LHC alone produces 600 million collisions per second, so even if only a relatively small amount of those produce kayons, we get loads of kayon decay experiment samples. lhc-machine-outreach.web.cern.ch/lhc-machine-outreach/collisions.htm

    • @halbeard2996
      @halbeard2996 4 года назад

      Depends on whether the result is above the 5 sigma threshold, which would make it statistically significant. I doubt Henry would cite it otherwise. Besides, the absolute percentage numbers don't mean much without the measurement error.

    • @BlueCosmology
      @BlueCosmology 4 года назад +1

      It's significant, the difference in k-long (which is what is being talked about in this video, it is incorrect when he says it is difference between K0 and anti-K0) decays to e+ compared to e- is 0.34%+/-0.01%, so the difference is definitely significant. It's been measured by a few different experiments, the most precise measurements of it are by KLOE and KTeV, which are consistent with each other. @@Dom-Nom-Nom claim about the LHC given us enough kaon decay samples isn't really true, we will never be able to measure this difference at the LHC (0.3% is a really really precise measurement, the LHC measures very few things this precise, certainly not kaon experiments, the background is much too huge).

    • @Dom-Nom-Nom
      @Dom-Nom-Nom 4 года назад

      @@BlueCosmology Thanks! Are there links to learn about those two experiments? They sound interesting.

  • @sodaPapa7176
    @sodaPapa7176 4 года назад +12

    "Simply, build a particle accelerator"
    LOL

  • @hinkles73
    @hinkles73 4 года назад

    I heard you talking about violating the CP symmetry, and that talk of symmetries reminds me of the best, if theoretical, symmetries ever- supersymmetry (SUSY)

  • @michaelbartlett6864
    @michaelbartlett6864 4 месяца назад

    This seems like a solution in search of a problem to me!