Schrödinger's cat: A thought experiment in quantum mechanics - Chad Orzel

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  • čas přidán 13. 10. 2014
  • View full lesson: ed.ted.com/lessons/schrodinger...
    Austrian physicist Erwin Schrödinger, one of the founders of quantum mechanics, posed this famous question: If you put a cat in a sealed box with a device that has a 50% chance of killing the cat in the next hour, what will be the state of the cat when that time is up? Chad Orzel investigates this thought experiment.
    Lesson by Chad Orzel, animation by Agota Vegso.

Komentáře • 9K

  • @varvaramir
    @varvaramir Před rokem +7944

    I love how schrodinger discovered the fundamentals of quantum mechanics and then just went "this is bs, im doing biology now"

    • @mikemondano3624
      @mikemondano3624 Před rokem +345

      As you advance in any field, the boundaries between them start to frazzle and knowledge and interest become monolithic. He never changed subjects, just focus.

    • @sagwan6991
      @sagwan6991 Před rokem +2

      most of science is just bs that just makes the most sense of all the sea of bs

    • @cowllama1353
      @cowllama1353 Před rokem +11

      Valid

    • @Listereen
      @Listereen Před rokem +3

      bababoeey whats bs

    • @duckduckshoes6393
      @duckduckshoes6393 Před rokem +7

      Not true cat actually makes sound from time to time so if you woudl stand close to the box you would know wheter the cat is dead or alive, no superposition.

  • @johnyboy228
    @johnyboy228 Před 3 lety +8037

    Everybody at schrodinger’s funeral: *hmmm*

    • @frazzydoof770
      @frazzydoof770 Před 3 lety +624

      both dead and alive until the casket is opened

    • @zenokwon1177
      @zenokwon1177 Před 3 lety +147

      *DUN DUN DUUUUN*

    • @greenlite37
      @greenlite37 Před 3 lety +367

      Schrodinger:I don't know if cat is dead or alive
      Cat:meow!
      Schrodinger:shut up!

    • @hydro3672
      @hydro3672 Před 3 lety +68

      @@frazzydoof770 technically since he did not die in the box this is not correct let me explain he was dead before hand so he would not have a chance to be alive if the box is opened there is only one outcome in that instance also his funeral was open casket so no schrodinger's cat theory was used on the funeral but you didn't know that so technically this was a schrodinger's cat theory example his funeral had a 50% chance of being open casket and a 50% chance of not me telling you it was opens the box to find your cat alive glad i saw your comment made me exercise my brain a bit 😁

    • @9se-floresshansylverc.398
      @9se-floresshansylverc.398 Před 3 lety +26

      @@hydro3672 It's a joke, but wow, that's a good way to exercise a brain.

  • @JustSomeDinosaurPerson
    @JustSomeDinosaurPerson Před 2 lety +2438

    A lot of people in the comments are missing the point. The point isn't "we don't know until we open the box". The point is that the cat IS both alive and dead until we open the box, which forces it into a definite state of one or the other.
    The point is that our interaction (which is a placeholder for measurements in physics) influences the outcome and changes the behavior of the entity being interacted with/measured into a definite state.

    • @niyaziaktn1596
      @niyaziaktn1596 Před 2 lety +32

      So is the cat ded or alive? Am damb

    • @Skanda1111
      @Skanda1111 Před 2 lety +64

      Thanks. Your comment made it very easy to understand.

    • @Rspknlikeab0ssxd
      @Rspknlikeab0ssxd Před 2 lety +173

      Forgive me but I've always been very confused about Schrodinger's Cat. How can something be both dead, and alive, simultaneously? If, to be alive, we must be consciously aware, have a heartbeat, etc., how can it be that we both have and lack consciousness, a pulse, and the like experiences? Schrodinger stipulates in his thought experiment that there is a 50 percent chance that the cat will be alive after the hour, and a fifty percent chance that it won't be alive after an hour. How does our interaction influence the outcome of the scenario? It seems to me that whether or not the cat is alive or dead is not ontologically significant. The cat's being alive is only epistemically significant, it seems to me. By that I mean that whether or not we observe the cat makes no difference as to whether or not the cat is dead or alive. It only matters insofar as we can *know* that the cat is dead, or alive. Is this not the case? And, if Schrodinger's Cat is only epistemically significant, why is that point not emphasized? It seems they threaten the fallacy of equivocation by not specifiying.
      Maybe I'm just missing the point. I don't pretend to be well-understood insofar as science is concerned (let alone a physicist), and I admire those who are. I would appreciate someone simplifying the Schrodinger's Cat thought experiment to the level of a child, while retaining its precise meaning, for me.

    • @jinolin9062
      @jinolin9062 Před 2 lety +134

      @@Rspknlikeab0ssxd the thought experiment is not about the cat but the fact that until we directly observe the object, the object is it two states at once when talking about quantum mechanics as far as I understand it. The cat could just as easily be a coin with a machine that flips it inside the box. Is the coin on heads or tails? No, the coin is one ~both~ heads & tails until we observe it according to quantum mechanics.

    • @Rspknlikeab0ssxd
      @Rspknlikeab0ssxd Před 2 lety +50

      @@jinolin9062 So then, as I am understanding what you're saying, quantum mechanics is inconsistent on logical grounds. For, it is inconsistent for something to be both alive and dead, heads and tails, be or not be, yes and no, etc. simultaneously.

  • @katia7440
    @katia7440 Před 2 lety +915

    You could show me this video like 10times and even if i payed real attention to it i could never understand it to the point where i would be able to explain it to someone. This is beyond the intellectual skills i could ever conquer in my whole life.

    • @peeter07
      @peeter07 Před rokem +54

      The reason why you should be afraid of physics and chemistry

    • @safaeit
      @safaeit Před 10 měsíci +72

      I heard one famous scientist said if you find science boring, you’re learning from the wrong teacher. It’s either he doesn’t want you to learn or he doesn’t fully understand himself, explaining like an AI.

    • @finixmoon127
      @finixmoon127 Před 9 měsíci +30

      ​@@safaeit This isn't about finding science boring (well perhaps for this person it might be), it's about understanding it

    • @they.love.claire
      @they.love.claire Před 9 měsíci +6

      I really dont understand intellectual but ok

    • @GRT999
      @GRT999 Před 9 měsíci +37

      In fairness it's dumbed down to the point it forgets to explain anything

  • @noahquiles5791
    @noahquiles5791 Před 3 lety +4951

    Shakespeare: “To be or not to be...”
    Schrodinger: “To be and* not to be...”

    • @deus2570
      @deus2570 Před 3 lety +116

      Schrodinger: "To be or not to be" *and I took that personally*

    • @alchemist2048
      @alchemist2048 Před 3 lety +100

      Scooby : Dobeedoobeedoo

    • @Anonymous-kw7ls
      @Anonymous-kw7ls Před 3 lety +9

      @@alchemist2048
      😂😂😂

    • @aditya-rt4zb
      @aditya-rt4zb Před 3 lety +23

      answer of every great question is a paradox

    • @mars9842
      @mars9842 Před 3 lety +1

      @@aditya-rt4zb almost like everything and its opposite exist

  • @solutionghostsimple6470
    @solutionghostsimple6470 Před 5 lety +5177

    Wanted Schrödinger's cat : Dead and Alive

  • @grandpastories1483
    @grandpastories1483 Před 2 lety +12

    "I don't know if the *cat* is dead or alive until I open the box"
    "Meow"
    "Shut up"

  • @aditisharma66
    @aditisharma66 Před rokem +172

    Let's appreciate the quality of animation used to design and explain quantum mechanics in a better way. It's extremely helpful for all the students studying it in academics. Good job :)

  • @thatguitardude4307
    @thatguitardude4307 Před 5 lety +6105

    Me: So, is the cat alive?
    Schrödinger: Well yes, but actually no.

  • @tomalmog8738
    @tomalmog8738 Před 4 lety +3624

    "To be or not to be, that is the question" - Schrödinger's cat

  •  Před rokem +66

    I would love a video on Schrödinger's "What is life?" answer. The definition he gave is one of the most beautiful and profound things I have ever heard

  • @dragon_mind1254
    @dragon_mind1254 Před rokem +188

    2:25 I’m learning this right now. Suppose you put a detector on both sides of the slits that detect which side the particle is coming from. It will not act as a wave function anymore, but as a particle. Take away the detectors and then it acts as the wave functions again. Quantum physics/mechanics is cool.

    • @vsgaming5933
      @vsgaming5933 Před rokem +5

      Isn't it a phenomenon

    • @elonmuskito7249
      @elonmuskito7249 Před rokem +2

      ohh yea the good old double slit Exp

    • @mohamedalhusni6255
      @mohamedalhusni6255 Před rokem +7

      is it because the observer affects the outcome itself ?

    • @mae-oz3eb
      @mae-oz3eb Před rokem

      my father explained it to me cause he's obsessed with physics and i think its really cool

    • @thehalfbloodprince-nm8uk
      @thehalfbloodprince-nm8uk Před 8 měsíci +3

      ​@@mohamedalhusni6255You can think it in this way
      When the particle doesn't interact with matter it acts like a wave.
      But when it interacts with matter it behaves like a particle
      Disclaimer: I may or may not be correct

  • @nebulaanishh
    @nebulaanishh Před 5 lety +22167

    Your crush actually likes you and doesn't like you at the same time, until your curiosity makes you approach her.

    • @farwakhan4423
      @farwakhan4423 Před 5 lety +3143

      ... then she rejects you and you're dead inside while being alive

    • @GAMINGWITHCHINAR
      @GAMINGWITHCHINAR Před 5 lety +798

      Hmmm.... I was not able to understand the video ... Until I saw this comment ... Thnx btw

    • @jumanahidris2973
      @jumanahidris2973 Před 5 lety +74

      Nice!

    • @aarambhverma1550
      @aarambhverma1550 Před 5 lety +353

      Oh man! You really made the concept very easy! True genius exists here! Love you brother!😁😁

    • @jumanahidris2973
      @jumanahidris2973 Před 5 lety +70

      @peeps hi whyever not?

  • @Shereigna
    @Shereigna Před 4 lety +4010

    Schrödinger’s Cat walked into a bar.
    and doesn’t.

  • @asparkdeity8717
    @asparkdeity8717 Před rokem +54

    I watched this video first years ago as a child who was baffled by this; now, in my second year of my undergrad maths course studying quantum mechanics as one of my courses, this makes so much more sense!

  • @colby722
    @colby722 Před 2 lety +9

    I've been puzzled by this for so long I needed to watch this. Explained it to me so well it seems really simple

  • @nickc.4070
    @nickc.4070 Před 6 lety +10265

    schrödinger: doctor, how is my cat doing?
    doctor: i've got good news and bad news...

  • @arandomjoe9749
    @arandomjoe9749 Před 3 lety +8663

    Is schrödinger trying to explain “I don’t know” with science

  • @Tanmay5616
    @Tanmay5616 Před rokem +6

    This is one of the channel who help me to understand educational concepts. Nice explanation!

    • @Leroy0070
      @Leroy0070 Před 19 dny

      True. It simplifies ideas ahead making it easy for one know what/how to learn.

  • @gbzorro
    @gbzorro Před rokem +4

    If we place these explanations Schrodinger's Cat and Quantum Mechanics into my brain, it melts.

  • @abidbourdi6877
    @abidbourdi6877 Před 3 lety +9556

    I will act like I understood everything

    • @whodeyharambe5776
      @whodeyharambe5776 Před 3 lety +236

      If anyone says they fully understand ...
      You lie

    • @whodeyharambe5776
      @whodeyharambe5776 Před 3 lety +6

      @not Funny I know ...not funny😾😺

    • @rodmaiquez726
      @rodmaiquez726 Před 3 lety +11

      You need to act, to understand something

    • @bocar4127
      @bocar4127 Před 3 lety +22

      It’s yes and no at the same time

    • @ShahidAhmed07
      @ShahidAhmed07 Před 3 lety +4

      @not Funny no it its more, if didn't understand quantum physics mean you understood.

  • @Stitchpuppy01
    @Stitchpuppy01 Před 5 lety +7719

    I understood the word "cat."

  • @ChanwooPark-me1wc
    @ChanwooPark-me1wc Před 2 lety +15

    이번 영상으로 슈뢰딩거의 고양이 실험을 제대로 이해한 기분이 듭니다. 각종 미디어에서 많이 다루는 주제이지만 대부분의 사람들이 잘못 알고 있는 실험인데, 저 같이 양자역학을 공부하지 않은 사람도 이해할 수 있게 영상을 만들어주셔서 감사합니다. 좋은 영상 감사합니다!

    • @dougdoan9190
      @dougdoan9190 Před rokem

      This is either chinese or english.. or both

    • @anneclaudia1491
      @anneclaudia1491 Před rokem +3

      @@dougdoan9190 both wrong cuz its actually korean

    • @dougdoan9190
      @dougdoan9190 Před rokem

      @@anneclaudia1491 you just broke physics

    • @fyo1903
      @fyo1903 Před 13 dny

      @@dougdoan9190 This is rasist and not.

  • @janhvinarayan1633
    @janhvinarayan1633 Před 8 měsíci +2

    Seeing this after studying wave optics in school and heard of this experiment in the big bang theory, science and universe is so vast and great, we never know enough and that's incredible

  • @mussabie
    @mussabie Před 3 lety +12353

    Schrodinger: there is no way that you can tell if the cat is alive or dead without opening the box
    Cat: *meow*
    Schrödinger: ...

  • @dogl0ver03
    @dogl0ver03 Před 7 lety +26403

    so if you open the box and the cat is dead, then your curiosity killed the cat

    • @vik24oct1991
      @vik24oct1991 Před 7 lety +850

      It is not like that , it is more like , the cat is already dead and alive but you are able to see one of them.

    • @AiNaKa
      @AiNaKa Před 7 lety +1528

      The joke
      Your head

    • @zachzent8287
      @zachzent8287 Před 7 lety +401

      Renee Claude My dog is named Curiosity

    • @saintpluto5613
      @saintpluto5613 Před 7 lety +307

      Even if you dont look, its either dead or alive so for instance if you dont look and its dead you just never know but its dead anyway. I mean our observation wont determine the cats situation right? That takes place anyway wether we look or we dont look.

    • @Kebabrulle4869
      @Kebabrulle4869 Před 7 lety +134

      Or, y'know,
      The curiosity killed *your* cat

  • @JoyDavidson
    @JoyDavidson Před rokem

    Amazing explanation. Thank you.

  • @ronaldl9085
    @ronaldl9085 Před rokem

    Great explanation. Thanks for sharing.

  • @jimmyjordan5048
    @jimmyjordan5048 Před 4 lety +4704

    Guess what the comment was by reading replies.

  • @caytlin100
    @caytlin100 Před 5 lety +5452

    My mom: you room is a mess
    Me: mom, that’s the superposition of the atoms. Until you opened the door my room was a non existence state. So is a mess and is clean at the same time.
    My mom:

  • @colinwhite5355
    @colinwhite5355 Před 7 měsíci

    I used Google translate to produce several recording of this explanation, including in; Yiddish, Swahili and Urdu. I then played them backwards, simultaneously. It made the whole thing so much easier to understand.

  • @gaburazeyy
    @gaburazeyy Před 3 měsíci

    Excellent explanation really

  • @bball33g
    @bball33g Před 9 lety +4232

    That moment when you drop your iPhone face down. It's both cracked and not cracked at the same time until you check.

    • @vedicpagan8852
      @vedicpagan8852 Před 9 lety +151

      LOL, quantum theory orientated jokes another thing to thank Schrödinger and his geeky science associates for ,oh the wonders of theoretical science hahaha : )

    • @bananaroot
      @bananaroot Před 9 lety +238

      Iphone is always cracked when it falls down, and is a disproof of quantum theories...

    • @jadeharley844
      @jadeharley844 Před 9 lety +119

      i've dropped my phone at least three times and it is never cracked. therefore, the comment above me is incorrect amd pointless.

    • @bananaroot
      @bananaroot Před 9 lety +62

      Jade Harley Classic case of experiment measurement error

    • @spectrum6474
      @spectrum6474 Před 8 lety +103

      +bball33g Schrödinger's Iphone must have had a rough life :(

  • @simonc7221
    @simonc7221 Před 4 lety +20621

    This is like the mystery of wether or not the refrigerator light stays on when the door is closed

  • @bluejesus105
    @bluejesus105 Před rokem +7

    This means we should close our loved once in a box and leave them there and as long as we dont open it, they are gonna be with us forever.

    • @Kyrelel
      @Kyrelel Před 10 dny

      Well done, you just invented a coffin

  • @ankittiwari15506
    @ankittiwari15506 Před rokem +2

    Schrodinger's cat : No dogs are harmed in this experiment.

  • @hassanaly4838
    @hassanaly4838 Před 3 lety +561

    So, did the cat survive?
    Schrödinger:Yesn't.

    • @raenashaikh3377
      @raenashaikh3377 Před 2 lety +9

      And so was the exclamation "yesn't" invented 👍

  • @thewalkingbread706
    @thewalkingbread706 Před 4 lety +1270

    “So is the cat alive or dead?”
    Schrödinger: *yes*

  • @franknomustard
    @franknomustard Před 4 měsíci

    Awesome work!

  • @roastie2210
    @roastie2210 Před měsícem +1

    3:16 An atom in two different ordits seems wierd, but two ordits can be in one place and the atom can ordit both of them. Means the two nucleus are spinning and atom is standing in one place. That explains this right.

  • @wan8234
    @wan8234 Před 4 lety +1616

    Schrödinger: did you die?
    Schrödinger's cat : yes.
    Schrödinger's cat : *But I Lived!*

  • @aduryant5265
    @aduryant5265 Před 5 lety +500

    Teacher: so you understand superposition now?
    Me: I'm in a superposition of understanding and not understanding.

  • @Alixxusa
    @Alixxusa Před rokem +5

    Ah got to love a video that explains everything and nothing all in one go 😌

  • @kondwaniphiri9772
    @kondwaniphiri9772 Před rokem

    that flew over my head ,am watching it again

  • @sombrerodog9699
    @sombrerodog9699 Před 6 lety +3216

    Schorödinger’s cat went into a bar
    And didn’t

    • @cheetahpiper6422
      @cheetahpiper6422 Před 5 lety +2

      I love this!!!

    • @nightgal5497
      @nightgal5497 Před 5 lety +46

      "so were you at the crime scene?"
      "i was....... and i wasn't"

    • @serenitybowers6422
      @serenitybowers6422 Před 5 lety +11

      It didn’t do either, but did both, until it was observed

    • @earfors
      @earfors Před 5 lety +8

      After some qubit analysis - a lot of cats went to that bar. Most were banned, some were lost. Others escaped. Many were entrapped by catnip. The few that made it through, became certainly quantum legends.

    • @katinthegetto2916
      @katinthegetto2916 Před 5 lety +1

      Sombrero dog your likes have reached 911

  • @teddyvia7134
    @teddyvia7134 Před 3 lety +1675

    no cats were harmed in this experiment - or were they..

    • @luna-hu5uw
      @luna-hu5uw Před 3 lety +105

      They *were* but they also *weren't*

    • @supremekiller2477
      @supremekiller2477 Před 3 lety +11

      they were and they werent

    • @toby2668
      @toby2668 Před 3 lety +55

      Hi VSauce, Michael here

    • @jacobnewman2494
      @jacobnewman2494 Před 3 lety +5

      "What makes something there, but not there, and simultaneously here, but not here????"

    • @qualily8286
      @qualily8286 Před 3 lety +3

      They weren't harmed, they were just killed, duh

  • @xaviermantha63
    @xaviermantha63 Před 2 lety

    Thanks for the video.

  • @BenS128
    @BenS128 Před rokem +2

    The 1st time I heard this theory I didn’t get it so I forgot it. The 2nd time I heard it I completely understood it in a few different ways. It’s Genius.

  • @AnthonyL0401
    @AnthonyL0401 Před 3 lety +10540

    schrödinger: I got you a gift
    me: *sigh* is it another dead cat?
    schrödinger: we won’t know until you open it!

    • @auauaua_conchas69
      @auauaua_conchas69 Před 3 lety +363

      ah, classic schrodinger, always being so mischievous

    • @areenhashemi2462
      @areenhashemi2462 Před 3 lety +83

      Underrated comment

    • @lowercaseguy3578
      @lowercaseguy3578 Před 3 lety +47

      So it means you can't know state of anything inside a box without opening it first . If that's all then why the headache of understanding the cat can be either dead or alive ......

    • @daalv8016
      @daalv8016 Před 3 lety +11

      You’d have to have an Alive cat at some point?!

    • @annikachristensen4323
      @annikachristensen4323 Před 3 lety +4

      LOL I'm dead 😂

  • @jessicajayes8326
    @jessicajayes8326 Před 5 lety +1122

    A student goes to the library an asks the librarian if there are any books on Pavlov's dog or Schrodinger's cat. The librarian says "That rings a bell, but I'm not really sure..."

    • @marioisawesome8218
      @marioisawesome8218 Před 5 lety +5

      hmm

    • @leitecunha
      @leitecunha Před 4 lety +20

      A fine joke! 😄

    • @dylan8443
      @dylan8443 Před 4 lety +11

      Big Brain time

    • @rasputingonzales6030
      @rasputingonzales6030 Před 4 lety +2

      Okay, that was pretty good.

    • @rasputingonzales6030
      @rasputingonzales6030 Před 4 lety +14

      “Not really sure” = Schrodingers Cat paradox. It the cat alive or dead in the box?
      “Rings a bell” = referring to the trained response of Pavlov’s dog salivating at the sound of a bell.
      * c’mon, dude.

  • @warren52nz
    @warren52nz Před rokem

    Nicely explained!

  • @hgtrad7655
    @hgtrad7655 Před 11 měsíci

    Quite nice explanation!!

  • @walterwhite3372
    @walterwhite3372 Před 3 lety +6960

    ‘Is your cat alive?’
    Schrödinger: ‘Well yes, but actually no.’

  • @illunis8273
    @illunis8273 Před 5 lety +2971

    is the cat dead or alive?
    Shrödinger: yes.

  • @ryanc9728
    @ryanc9728 Před 2 lety +6

    This is the same as sending a snap to your crush asking if y’all can go out on a date and getting a snap back.. the answer is there but you won’t know until you open it. And in that moment you u feel what Schrödinger felt.

  • @Glacierrune
    @Glacierrune Před rokem +2

    Totally off topic but the lil transistors are SO CUTE. I WANT ONE AS A PET FR. 3:59

  • @BIGFACTSENTERTAINMENT
    @BIGFACTSENTERTAINMENT Před 6 lety +2778

    When you're sleeping the world doesn't exist until you wake up

    • @antiquarian1773
      @antiquarian1773 Před 5 lety +235

      or the universe exist because you were born O-O

    • @bonjovy2720
      @bonjovy2720 Před 5 lety +138

      The best short explanation of quantom mechanics, thanks

    • @ditinct8894
      @ditinct8894 Před 5 lety +102

      The moon doesn't exist until you look at it

    • @antiquarian1773
      @antiquarian1773 Před 5 lety +73

      @@ditinct8894 how about this one... You only wake up in the morning because you expect too.

    • @ditinct8894
      @ditinct8894 Před 5 lety +124

      @@antiquarian1773 your comment doesn't exist until I look at it

  • @sam_k
    @sam_k Před 5 lety +6704

    I can't be the only one who understood absolutely nothing

    • @magentas6467
      @magentas6467 Před 5 lety +1585

      you're not but you are

    • @Tiandesta
      @Tiandesta Před 5 lety +14

      Yup

    • @ethanblevins1116
      @ethanblevins1116 Před 5 lety +453

      It’s a fancy way of saying, “Something is everything until observed”

    • @05xpeter
      @05xpeter Před 5 lety +396

      Feynman: "If you think you understand quantum mechanics then you don't understand quantum mechanics"

    • @jellyfishcluster
      @jellyfishcluster Před 5 lety +156

      You’re not supposed to understand quantum physics

  • @codycarter2643
    @codycarter2643 Před 2 lety

    The process brought back my focus, not my lack of feeling

  • @hecate8950
    @hecate8950 Před rokem +2

    I was very confident that i understood and felt proud till this man brought in wavelength and what not. (note: i am not complaining tho it's just that i will have to rewatch that part and make my brain connect what he is saying and understand)

  • @ayomibhumi9356
    @ayomibhumi9356 Před 8 lety +2234

    Schrödinger got pulled over by a cop. The cop look in the trunk and said "do you know there's a dead cat in the back?" "Well now i know, jerk"

    • @styot
      @styot Před 8 lety +208

      +Ayomi Bhumi Schrödinger took his cat to the vet, and the vet told him "Sir, I've got some good news, and some bad news."

    • @marissachavez6445
      @marissachavez6445 Před 8 lety +2

      Lmao

    • @maacpiash
      @maacpiash Před 8 lety +4

      +Ayomi Bhumi Jerk? You mean da/dt? ;)

    • @maximtiburziano872
      @maximtiburziano872 Před 8 lety

      lol

    • @svendjensen9365
      @svendjensen9365 Před 8 lety +10

      +Ayomi Bhumi he got pulled over and didn't!

  • @khangbui3914
    @khangbui3914 Před 5 lety +1652

    Well, I’m alive but dead inside

  • @Aarush_smile
    @Aarush_smile Před 10 měsíci

    what a great explanation

  • @veerchasm1
    @veerchasm1 Před rokem +1

    “Does a bear fart in the woods?” Is a better allegory

  • @suryahr307
    @suryahr307 Před 3 lety +785

    My PhD interviewer: What is schrodinger's cat thought experiment?
    Me: To me, I'm both selected and rejected for the admission until you tell
    Interviewer:

    • @aerisdl
      @aerisdl Před 3 lety +23

      TIME TO DO THIS

    • @suryahr307
      @suryahr307 Před 3 lety +26

      @@aerisdl if they ask, I do think it's the best witty answer.

    • @vineet3269
      @vineet3269 Před 3 lety +10

      No. The selection is done only after they make a decision. However, the death of cat already has a chance before the cage is opened

    • @suryahr307
      @suryahr307 Před 3 lety +8

      @@vineet3269 of course I meant "after the decision was made"

    • @shauryagauniyal9125
      @shauryagauniyal9125 Před 3 lety +5

      Boom!! You passed the interview 🙌

  • @keertiathalye5793
    @keertiathalye5793 Před 3 lety +5025

    “What we know is a drop. What we don’t know is an ocean”

  • @catkeys6911
    @catkeys6911 Před rokem +1

    This was a nice, clear explanation. Of course, I still don't understand the idea of electrons being shared among atoms, as is claimed in this video. In school, I was taught that electrons spin around the nucleus of atoms. So if they're moving from atom to atom, it sounds like they are not (?).

  • @vinfinity8940
    @vinfinity8940 Před 2 měsíci +1

    I am glad I understood this video better than ever after 3years and a physics degree.

  • @theminingstar4672
    @theminingstar4672 Před 4 lety +932

    There is food in your fridge until you open it. *Boom.*

  • @kayd4128
    @kayd4128 Před 2 lety +702

    no one:
    Schrödinger: *hehe unboxing time*

  • @chetanoimbe2572
    @chetanoimbe2572 Před 2 lety +3

    There is one thing I understood. I am naming my next cat Schrodinger.

  • @xpndblhero5170
    @xpndblhero5170 Před 2 lety +2

    Actually in the double slit experiment they recently found that the particle goes through one of the slits but the wave function goes through both then affects the particle on the other side, it also shows that sometimes the particle doesn't go through any slit but the wave it rode on did and still had an affect on the results..... So basically the act of measuring the test is enough to mess w/ the results, I feel like the only way we'll be able to see what's really going on is if we start trying to come up w/ a magnification device that doesn't use electricity because even at that scale, a small amount of energy is tantamount to trying to hear a flea crawl on a guitar string while someone is playing Through the Fire and Flames by Dragonforce on the guitar at the same time. 😂🤣

  • @gabrielbondoc863
    @gabrielbondoc863 Před 7 lety +2592

    Feels like u were taking about the cat in the first minute, but then changed subjects, but didn't at the same time...

  • @JasonJacksonJames
    @JasonJacksonJames Před 8 lety +1087

    All I understood was the story of the cat put in a box

  • @zackcarl7861
    @zackcarl7861 Před rokem +1

    The wave nature explanation should have been told after you had given the second case that if one slot is blocked the pattern doesn't appear then you as a conclusion could say so the Patten with 2 slits say that the wave nature is formed and all ...etc etc

  • @taer7097
    @taer7097 Před 2 měsíci +1

    “The cat is both alive and dead”
    The Cat:meowing and scratching at the box

  • @sudhanshuyadav19
    @sudhanshuyadav19 Před 3 lety +785

    Schrodinger's cat
    Wanted
    Dead or alive

    • @carlosmspk
      @carlosmspk Před 3 lety +44

      That means if he's dead and alive, there's no reward for you :(

    • @hereicomeiamcinnamon951
      @hereicomeiamcinnamon951 Před 3 lety +12

      @@carlosmspk very sog champ moment :(

    • @areenhashemi2462
      @areenhashemi2462 Před 3 lety +3

      Underrated comment

    • @krokiety5712
      @krokiety5712 Před 3 lety +14

      @@carlosmspk you would get double reward and no reward until you turn it in and find out

    • @hertzair1186
      @hertzair1186 Před 3 lety +3

      ...saw that on a Tshirt

  • @ketuu4057
    @ketuu4057 Před 5 lety +484

    Video: *ends*
    Me: I didn't understand anything but loved the animations

    • @ladymarcy7830
      @ladymarcy7830 Před 4 lety +21

      I understood one word: cat
      All others:🗿

    • @Monochromicornicopia
      @Monochromicornicopia Před 4 lety +6

      It made no sense because its wrong. TED-Ed got schrodingers cat completely backwards. Its actually a counter example that shows how quantum mechanics CANNOT be applied to large systems like cats.

  • @angusburnet2714
    @angusburnet2714 Před 2 lety +3

    Wouldn’t the cat’s own thoughts and movements alter the probability of outcome? For observation to change the outcome, the cat would have to be both motionless and thoughtless (considering all other extraneous variables have been eliminated). Is a motionless, thoughtless object even alive?

  • @Jazzerizer
    @Jazzerizer Před 2 lety +3

    is this kinda like
    "if a tree falls in a forest with no one around, does it even make a sound?"

  • @enigma6703
    @enigma6703 Před 8 lety +2587

    When you swim near the shore of the sea of knowledge and then venture to go out a bit deeper ... and drown in it.

    • @user-ht3tp3uj4v
      @user-ht3tp3uj4v Před 8 lety +25

      +Enigma Yeah, I just got drown.
      Now I don't enjoy swimming.

    • @matthewclifford7217
      @matthewclifford7217 Před 8 lety +45

      +Enigma Well at least we all die thinking we're smart.

    • @eyeheisenberg2278
      @eyeheisenberg2278 Před 8 lety +4

      +Enigma It's pretty straight forward.
      Are you the center of the Universe or is the Cat?
      I don't believe that the cat is irrelevant as Schrodinger does.
      Let's say a human straps a cat to a table forcing it to view a box wired with a 50/50 life/death chance.
      The human then climbs in the box which can only be opened when the cat meows.
      Does the human sit suspended between life/death until the box is opened? Of course not.
      The human died or survived the moment the lid closed when they got in.

    • @matthewclifford7217
      @matthewclifford7217 Před 8 lety +20

      Eye Heisenberg
      
      I have a simpler explanation, however, I'm not sure if it's right or not.
      Again, we have a cat. Now I pull the pin of a grenade, shove it into a specially-made box along with the cat, then shut the trap. This grenade, however, is special because it has 50 percents of exploding, thus killing the cat, and 50 percents of malfunctioning, rendering the cat safe. This box here, is soundproof and is indestructible, so absolutely zero information can pass onto us - the observers. The only way to see the final fate of the cat is to open the box - or measure it. This is where it got interesting in QM. BEFORE you open the box, there's an imperative 50/50 chances the cat is either dead, or alive, so during that time where we know zero information of the cat's fate, we can say that it is, in fact, half dead and half alive.
      So to be exact, the cat is in superposition of being both dead and both alive at the same time BEFORE you measure it, or open the box. When you open the box, or measure the cat, the result will collapse back into a single state, making the cat EITHER dead or alive, and not both.
      This is a weird way of thinking, because in normal, rational way of thought, the cat is either dead or alive, there's no such thing as being both. Or the grenade either explode, or not and only one single result can be deduce even before measurement.

    • @eyeheisenberg2278
      @eyeheisenberg2278 Před 8 lety +1

      Matthew Clifford That is the same as Schrodinger's Cat but with a grenade.
      The cat is either alive or dead whether we know it or not.
      Our ignorance of a fact either way does not make this "cat is in superposition of being both dead and both alive at the same time" caper of Schrodinger true except in his own imagination.

  • @Churre1
    @Churre1 Před 4 lety +352

    Me: What do you have in that box?
    Schrödinger: A cat
    Me: Alive or dead?
    Schrödinger: Yes

    • @KelvenOne
      @KelvenOne Před 4 lety +1

      now i'm wondering, who would ask that question?
      Person 1: yo i got a cat in a box
      Person 2: cool cool, is it alive?

  • @guywhoateallthepizza1031
    @guywhoateallthepizza1031 Před 2 lety +4

    So this is basically "If a tree falls and no one is around to hear it, does it make a sound?"

  • @jonchilds1637
    @jonchilds1637 Před rokem

    Kind of creepy that I’d never heard of Schrödinger’s cat until it was mentioned on TV last night - and today it’s on my CZcams front page!!!

  • @daniellandoe8069
    @daniellandoe8069 Před 5 lety +458

    0:52 what seems absurd is that the cat has two tails.

    • @nsbhater
      @nsbhater Před 5 lety +5

      Agreed 😹 I guess is was the drawers effort towards an equal fifty-fifty 😹 maths and logic don't always unite 🙈

    • @humanbeing1429
      @humanbeing1429 Před 5 lety +6

      You made me go back to 0:52 and I laughed out loud.

    • @angelicasysnila5476
      @angelicasysnila5476 Před 5 lety +8

      The fact that it has two tail cuz they are two different cats of two different realities, which in represented as a single merged cat

    • @inessa5923
      @inessa5923 Před 4 lety +1

      You’re being transphobic

    • @drosophilamelanogaster3121
      @drosophilamelanogaster3121 Před 4 lety +1

      Actually yes but no

  • @jacksonstein809
    @jacksonstein809 Před 4 lety +474

    “Famous for something he never actually did”
    Christopher Colombias: Hold my Smallpox

    • @ainzoshle457
      @ainzoshle457 Před 4 lety +19

      I thought it was Christopher Colombus.

  • @threelittlelemons
    @threelittlelemons Před 2 lety +3

    I'm still giving this video a like even though I understood nothing.

  • @greggrobinson5116
    @greggrobinson5116 Před 2 lety +2

    Well, the cat certainly knows whether it's dead or alive, even if Schrödinger doesn't. And every particle in the universe knows exactly what its doing too, even if we can't describe it. Schrödinger's problem seems more about detection & semantics than it is about some state where things are both A and --A until someone peeks

  • @anuragarya6416
    @anuragarya6416 Před 7 lety +327

    Before clicking on this video, I had a 50% chance of understanding it, but now when I DID click, I am Brain-Dead.

    • @firefoxyt6600
      @firefoxyt6600 Před 5 lety +1

      😂😂😂😂😂😂 true

    • @ally462
      @ally462 Před 5 lety

      Welcome to physics

    • @serenitybowers6422
      @serenitybowers6422 Před 5 lety

      i recommend watching the “quantum mechanics for dummies” video, it really helped me

  • @05xpeter
    @05xpeter Před 5 lety +805

    Richard Feynman :"If you think you understand quantum mechanics then you don't understand quantum mechanics"

    • @Derekivery
      @Derekivery Před 5 lety +5

      Very VERY true!!!!!

    • @shaunaksawargaonkar7814
      @shaunaksawargaonkar7814 Před 5 lety +23

      I thought i understood
      But now i realise that i don't
      .
      .
      .
      Ok so now i truly understand it

    • @00ryanm00
      @00ryanm00 Před 5 lety +4

      Its best to just accept the theory and not think too deeply about it as unfortunate as that sounds. Ill let the theorists keep themselves up at night and spare myself the heartache lol. The theory is very possibly incomplete and I like to believe there are hidden variables that solve these issues.

    • @arminbahamin6889
      @arminbahamin6889 Před 5 lety

      .. So far no hidden variables have been found for a century!

    • @00ryanm00
      @00ryanm00 Před 5 lety +1

      Yes, but each of those experiments only tests one hidden variable. If you try to prove all hidden variables dont exist by proving case by case, then youll never prove they dont exist because you need to do it an infinite number of times.

  • @jeffreys-vu6gd
    @jeffreys-vu6gd Před 9 měsíci

    Sheldon and Leonard taught me so much!

  • @wegiveafork4357
    @wegiveafork4357 Před rokem

    this just integrated so many of the chapters I learnt in 12th! 🤯

  • @DoodleDan
    @DoodleDan Před 5 lety +2742

    What if you had a camera in the box?
    *Physics left the chat*

    • @royaamuzumaki3891
      @royaamuzumaki3891 Před 5 lety +500

      DoodleDan hahaha. But the reason we can't have a camera is that for something to get into a superposition, it is required that it must not be watched, heard, speculated, or recorded in any way. Otherwise it can't enter a superposition.

    • @justsomedudeiguess1746
      @justsomedudeiguess1746 Před 5 lety +292

      The universe has a secret and it wants to keep it

    • @igglyy3776
      @igglyy3776 Před 5 lety +134

      DoodleDan then you have observed it, and by using your curiosity you have either killed or kept the cat alive.

    • @MrMasterKaio
      @MrMasterKaio Před 5 lety +55

      It's not really about observation. It's about interaction with other particles. So Schrödingers cat would never work. It always is in only one position, namely dead or alive.

    • @igglyy3776
      @igglyy3776 Před 5 lety +12

      Kai but schrodingers cat was namely an example of superposition no?

  • @anvit6363
    @anvit6363 Před 5 lety +298

    Me: Is the cat alive or dead?
    Schrödinger: Yes

  • @dcrespin
    @dcrespin Před 2 lety

    For those already initiated in QM I repeat here some comments previously made to similar videos. They may clarify debatable points.
    The Schrödinger time dependent equation (STDE) when applied to a wave representing an initial state of, say, an electron bound to a proton and together forming a hydrogen atom, predicts and retrodicts all the future and previous states of the electron wave, in the same fashion than the evolution equations of classical mechanics predicts the movement of the Earth around the Sun. Note that the STDE is energy conservative, that is, the initial state as well as the predicted and retrodicted ones all have the same energy.
    As is well known the bound electron has a completely different conduct. Whatever the initial state and in absence of other interactions an excited electron will settle in a stationary state radiating energy (in the form of a photon) along the way. If the stationary state is the ground state the electron will stay there forever (in absence, as said before, of other interactions). Otherwise the stationary electron state is ephemeral and will be abandoned to radiate a photon and assume a new stationary state of even lower energy. This "down the staircase" process repeats until the ground state is reached. There is no manner to adapt the STDE to this physical process. This inconsistency was discovered by none other than Niels Bohr, as can be inferred from the report of Werner Heisenberg. See our note
    www.researchgate.net/publication/356193279_Deconstruction_of_Quantum_Wave_Mechanics
    After discovering the tremendous inconsistency between the equation and the atom it would have been natural to announce that the STDE contradicted physical facts, and ask for a correct equation. I assume as true, but only know from hearsay very long ago, that in Einstein's viewpoint the correct deterministic time dependent wave equation had to be non-linear in contrast with the linear STDE. References to this historical detail would be appreciated.
    It is hard to believe but, against reasonableness and common sense, Bohr decided to adopt the STDE as correct and that continuity, causality and determinism of physical processes were wrong because they contradicted the STDE. Apparently mathematical equations on paper were more relevant than the experience of the whole human race. Then a series of new and fanciful "quantum physical principles" were adopted.
    In my opinion the powerful quantum establishment dogmatically defends Quantism and strongly rejects any attempt to correct its misdeeds, even if the correct deterministic time dependent wave equation is available.
    With best regards to all
    Daniel Crespin

  • @user-mm6ln7io2l
    @user-mm6ln7io2l Před 2 lety

    Box: meows
    Schrödinger: i'm gonna pretend I didn't hear that.

  • @ironvanguard7219
    @ironvanguard7219 Před 6 lety +595

    I could understand it until he said “superposition”

    • @firefoxyt6600
      @firefoxyt6600 Před 5 lety +41

      I could understand it until he said "Australian"

    • @jaycheda3232
      @jaycheda3232 Před 5 lety +9

      @@firefoxyt6600 i couldnt understand

    • @firefoxyt6600
      @firefoxyt6600 Před 5 lety +2

      @@jaycheda3232 you couldn't understand my comment or the video??

    • @jaycheda3232
      @jaycheda3232 Před 5 lety +9

      @@firefoxyt6600 everything

    • @Monochromicornicopia
      @Monochromicornicopia Před 5 lety +14

      the Schrodinger's cat thought experiment was devised as a counter-example to illustrate the absurdity of applying quantum mechanics to macroscopic systems.

  • @highonhopium
    @highonhopium Před 2 lety +4928

    Imagine in another universe this experiment will be known as cat's schrodinger 😂

    • @alfmea
      @alfmea Před 2 lety +90

      Makes sense.

    • @thesoundsmith
      @thesoundsmith Před 2 lety +228

      The original postulate should have been, "Put Schrodinger in the box..."

    • @allthebrighttplaces
      @allthebrighttplaces Před 2 lety +18

      Manfried the Man joined the chat

    • @schensho6567
      @schensho6567 Před 2 lety +58

      @@thesoundsmith or "Box Schrödinger in the put..."

    • @aswinlal5341
      @aswinlal5341 Před 2 lety +11

      Rick and Morty stuff 🤣

  • @indigocheetah4172
    @indigocheetah4172 Před rokem

    Most videos, have not stressed me out , until now

  • @raintree3383
    @raintree3383 Před 2 lety +1

    Thanks for explaining Schrodinger's Cat.....it was helpful for me to realize that I don't understand Schrodinger's Cat