What Is Schrödinger’s cat? Schrödinger’s cat refers to a thought experiment
proposed by the renowned physicist Erwin Schrödinger who used it to illustrate the weirdness of
quantum theory. Quantum theory says that until a particle
is measured and observed, it actually exists in all the states it could possibly be in,
simultaneously. So if there is a statistical probability that
this particle could be found here in one state, here in another state, here in another state
and here in another state, then the particle will in fact be existing in all of those states
at once. This is referred to as the particle being in a superposition. When the particle is measured the superposition
collapses and the particle chooses one state to be in over all of the others and this is
the state that our measuring instrument will observe. If this is true then it should apply to larger
objects since all matter is made up of particles. But of course we know that that does not happen.
We observe larger objects occupying only one state. Schrödinger came up with the cat example to
bring home just how odd the behaviour of particles as described by quantum theory is. In this experiment a cat is placed in a covered
box with a radioactive sample that has a 50% chance of decaying and killing the cat. While the box is covered we have no idea if
the cat is dead or alive and only once we open the box will we know if the cat made
it or not. So if we think of the cat like a particle,
using the superposition principle we would say that while the box was covered and the
cat was not being observed, the cat was both dead and alive in order for it to be all the
states it could possibly be in. Only when we lifted the box to observe the
cat, that is once we carried out our act of measurement, did the cat’s superposition
collapse for it to be either dead or alive. Common sense tells us that before we uncovered
the box the cat was either dead or alive but not both at the same time and our act of observing
didn’t force one outcome over the other. But common sense is not something we can cling
onto when studying the quantum realm. Countless experiments have shown us that sub atomic
particles behave in strange ways that we don’t observe in larger matter. There is a theory called the many worlds theory
that states that anything that can happen does happen. So when Schrödinger’s cat
was observed in one universe the cat was found to be dead and in another universe the cat
was found to be alive. The theory explains it like this: when the
cat was in the covered box it was in the superposition of being both dead and alive. When
the box was uncovered a split in the Universe occurred where in one Universe the cat was
dead and in another the cat was alive. The implications of this are mind boggling. Every time there is more than one possible
option available for the Universe, the Universe splits and creates copies where all possible
outcomes come true. So for example there could be a world where Hitler won World War 2, a
world where mankind never made it to the moon and a world where penicillin was never discovered. There could also theoretically be worlds that are
much more advanced than us, a world where humans have been able to glimpse further and
deeper into the workings of the Universe and have even been able to achieve immortality.
If that was the case then every person has achieved quantum immortality in one alternate
reality or another. As always we hope you enjoyed this video and
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  1. So what I'm wondering is, if there are two outcomes and the universe makes both true. Then when we are all born, in the other universe we are not born???

  2. Great explanation. In another universe it was absolutely dreadful. Oh well, good thing we aren't there 😉

  3. If you put Schrodinger in the box and had the cat outside the box you would have different physics.
    A hungry Siberian Tiger would have prized open the box and eaten Schrodinger.
    The Tiger is the observer when the German is in the box.Germans threw millions living people into boxes and gassed them.The stupid Germans think that the cat inside,or Jews, don't exist just because Germans cannot see them.

  4. It is like the light in the fridge. Is it on or is it off? Once you open the lid and observe, the light collapses and choose one state to be in. In it's super position it is both on and off. Thus it is like in the evening. By this one could be tempted to say the evening is a super position. But as we also have dusk we have to account for the fourth dimensional space. In the fourth dimensional space the light in the fridge can have four states instead of two. Once the lid is opened in the 4D realm the light choose two states to be in. As we live and only grasp at most the 3D space, but can also grasp the shadow of a 3D object onto a 2D space, we can grasp the shadow of 4D superimposed onto our 3D space. All we have to do is create a 4D model of a fridge and we will know if the light is on or off.

  5. After watching many of these videos I came into conclusion that I will never understand this cat-box shit

  6. You know what, just take a glass box, put a cat in it and observe the result without opening the box. Do it!

  7. For everyone who gets confused with all these experiments. In my opinion, the observation of the cat doesn't corrupt any superposition. The cat is either alive or dead (we sure dont know till we see it), but not both. However, observing an electron does corrupt its superposition, cause by observing it you are absorbing a photon which comes from the electron and thereby changing (in great amount) the electrons energy. It's like forcing the cat to drink the radioactive material and seeing it dead.

  8. I don't think Schrodinger claimed that cats have superpositions when unobserved. This example was invented to show the discrepancy between classical physics and quantum physics. It is not clear why we should to assume that a cat can be alive and dead at once just because it is inside a cardboard box.

  9. If the observer really defines the event, than not all possibilities occur. This is not physics. This is not philosophy. This is stupidity.

  10. that means I'm dead and you are all a construct of my imagination, and i'm in a Haruhi Suzumiya scenario. damn.

  11. About the double slit experiment. Common sense tells you that it is being observed and measured since the beginning of the experiment. So something else is going on. I found an old black and white clip back in the day of a guy giving a lecture on it. I wanted to see what they were doing. It turns out they were turning on the light and they do admit that the light interferes with it. But they still want to know about that probability of which hole it chooses to go through when first shot out. Here’s the video:

  12. Only problem with the many worlds theory, there would be a demension that's found a way to travel between dimensions. So where are they?

  13. I spilled water on my laptop. It’s laying upside down on my pillow and I’m praying it’s okay.
    I looked at it and it reminded me of the Schrödinger’s cat. Just like the cat could be dead or alive, my laptop could be damaged or fine. The cat, just like the laptop, is in both states of being either dead or alive until you check.
    My question is, would it be possible to alter states however you wish?

  14. Now read my thought experiment
    Mr. Jones receives a call from his brother telling him his wife just delivered a baby and she still is in the hospital. Mr. jones asks if the newborn is a boy or girl and his brother says he doesn't know. It takes him 30 minutes to get to the hospital. according to quantum mechanic the observer (Mr. Jones) doesn't know the sex of the newborn so it is boy and girl until the time he finds out. But biology would tell us the sex of the newborn was determined 9 months ago when the father's genes mixed up with mother's genes.

  15. Well of that's true them some super genius in another universe out of the infinite universe's is coming to kill me (well im still alive so either the copy universe theory is wrong or there is no possible way to travel to another universe)

  16. There was fifty percent of probability that I'm gonna like the video until it ends & it ended up being unliked though it will get the one in another universe…… Schrodinger got no chill🔥

  17. ANY COMMENTS?………..Schroedinger's cat experiment slightly modified that i might ask a substantive question……….what if all in the experiment were to remain the same, but that we use acid instead of poison. The fumes, once released would still kill the cat. Now i add one change to the mechanism inside the box. IF the cat were to lie down, a device would cause the acid vile to tip over. It would not matter if as yet the hammer had not broken the vile. When it did, which within the context of the time period of the observer's concern it eventually would, if the cat were standing, the fumes of the acid released with the breaking of the vile would kill the cat which would then fall and cause the vile to tip, releasing the acid to fall to the bottom of the box. If the cat were to lie down on its own before the vile were broken, the mechanism would still cause the vile to tip, which when broken would by means of the fumes, kill the cat and cause the acid to run out of the vile onto the floor of the box. In this scenario, the observer would be forced to observe when the acid had eaten through the box and begun to drip out onto the ground or table below. Is it not so that here there IS NO wave form to collapse? Is it not the case that the acid is now visible due to a string of deterministic events dependent on the cat being dead and only dead? I would very much appreciate your feedback on this.

  18. This is beyond mindfucking me, but is it basically saying without opening the box the answer to the question of whether or not the cat is alive is Yes? Is there any way someone can explain why without being observed, one particle exists in multiple places? Or if that is even the right question? Also she said the many worlds “theory”. I don’t know how that could ever be substantiate, so I’m assuming the video misspoke and meant hypothesis?

  19. That added interpretation of the Many Worlds is nonsensical to me anyway. If the cat is dead when we open the box, he died before we opened the box. We can mesure this. So opening the box is not what would change the story. The made up cat experience speaks about what could happened at the scale of quantum physics and can't be (as far as I know) applied to our scale. At least not the way it is described in that video. I know many good scientists are talking about the possibility of this Many Worlds therory, but it can't be a matter of WHEN the changes are happening. If everything exist in an infinity of possible universes then we just are one of them and that's it. No need to try to branch all of them to one another at some points in time.

  20. Hey, this is Sia from another parallel universe. In my world, Schrödinger is actually the inventor of corn dog. He has many cats and he feeds them with corn dogs…

  21. Why does the cat need to be in a box? Why can’t it be chained up sitting on the floor with the killing device sitting next to it? You stand with your back to the cat and just turn around and look at it to make the measurement.

  22. Today this principal has to take the SJW agenda and have an additional 72 states of gender as well as being alive and dead. Could also be a dog…

  23. Please read this comment you will benefit

    That must be wrong if there is The possibility that the cat is alive or dead and we do not know it does not mean that it is alive and dead at the same time and if we say that the mind is wrong, how if this result is reached and if you want to say this wrong and shrodinger is genius I will say but he is wrong even if he is right and I think you can't ask how😅

  24. For the science's sake, it's a 'thought experiment'. It explains only one thing – what we, as human beings with perceptual limitations measure in our perceived one point in time is not necessarily one point in time on a quantum level. Everything there is simply faster than our perception, tools and sense of time.

  25. One Universe is the reality of the Universe that we as Humans are perceiving
    Any Other Universe of Possibilities is not a literal physical Universe imo, It is a scientific metaphorical Universe of Possibilities. It is a proven philosophy in advanced modern science not a proven physical reality perceived on a physical Universe, in my rough guesstimate of attempting to comprehend such high level scholastic rubbish 😉
    I can get to a neat completely different level of consciousness on a large amount of Psychedelic Mushrooms where everything I see in my head is nothing I have ever perceived observing in reality in life on Earth. I consider that a different state of Consciousness, but I do not believe in any other physical Universe other than one. But we as humans should pursue many different levels of consciousness through exploring Natural Psychedelics and meditation, but that is as close as I can get to explaining any other idea of "Universe's" possibly perceived or explained by others.
    The words "Universe" or "Dimension" based on consciousness or Spirituality are vague or poorly defined words used to describe powerful psychological, conscious experiences, or Spiritual philosophies.

  26. The super position does not have to split reality into more realities (or your world into other worlds) every time a conscious decision or observation is made……..or held in probably. Perhaps all an infinite number of realities exist of which the probabilities of every superposition of sub atomic particles exist in which only collapse into one position or state as with the cat in the reality we are locked into………this way subatomic particles behave just like all matter but only manifests itself into a collapse within the reality we are found in………and does so for every other option of superposition but only in the given reality or world if you prefer that particular observer is in…..If this is disturbing or difficult to grasp……….don't be surprised…………its taken me 50 years of study to "deal with it" so to speak to where it (dare I say) makes sense….

  27. Possibilities are only so due to a definite reference point, thus, since everything is a floating set of possibilities what can be a definite reference point? Therefore, there is not one possibility, only, itself.

  28. Success in understanding something can never rely
    solely upon common sense, intuition, mathematics, or upon every known physical law.
    Some questions which cannot be asked, formulated, or even concieved may well still have insurmountable barriers. They may always.

  29. Shrodinger's cat experiment is WRONG and here is why I believe so: the observation/measurements have already been done before the experiment even begins ! When we've discovered that radioactive materials DO decay and that poison DOES kill living organisms.
    So …. there is a 100% probability that the cat will die.

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