The Quantum Experiment that BROKE Physics forever (The Double Slit Experiment)

This is the 1 Double Slit Experiment that changed our view on reality and physics forever. The science experiment triggered a lot of revolutionizing theories about classical physics, quantum physics, quantum mechanics and basically everything that has to do with quantum phenomena. It's this experiment that made the world of science and research realize that our classical laws of physics do not apply to everything and that next to the macroscopic world and it's laws of physics, there is also a microscopic world and it's laws of physics which is Quantutm Physics.

The double-slit experiment by Thomas Young uses particles such as photons or electrons to shoot through two slits. The electrons, even though they are electrons, behave like waves, instead of behaving like particles, creating an interference pattern on the screen. This is unexpected, as it shold not behave like waves. When scientists tried to observe through which slit the electron went, the electron did NOT behave like a wave anymore and behaved like predicted, like a particle. It went to either one or the other slit. The act of measuring, or rather, observing the particle, led to different laws of physics existing for the electron. How is that even possible? How can a simple observation lead to reality behaving completely differnt? The superposition, which described, that the electron can exist in all states and could theoretically go through both slits simultaneously, collapses when a observation is made.

There are many ground-breaking theories and interpretations after the Double-Slit experiment, for example The Many Worlds Interpretation or the Copenhagen Interpretation. Physics scientists and professors argue that it's entirely possible that there are several realities and multiverses, rather than only one possible reality.

In this video you will learn everything we know about the Double Slit Experiment and the interpretations.

If you like this video please give it a like and let us know your thought about the Double Slit Experiment in the comments!

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[stevejones]

Let me clear something up for the content creator on this one. The double slit experiment has troubled more than high school students like say Albert Einstein for instance..

[geradakiapen]

What I'd like to know is what happens to the particle after it hits the wall? Does it disintegrate fully? Partial disintegration? Changes it's form? Combines with particles on the wall to create different particles? Absorbed into the material whilst still containing it's original form? I understand where the particle originates at the start of the experiment, and what happens as it comes across variables affecting it's particle attributes giving rise to probabilities (the reactions will depend on it's inherent properties). But what happens to the particle afterwards? Probabilities arise between start and finish. Duality exists that's for sure, it's one of the particles inherent properties. But singularity comes into play at the begining and at the end. Singularity may also arise again between start and finish if a variable brings it back to it's original inherent characteristic. There has to be a balance. In other words duality gives rise to singularites which gives rise to duality, a continuous chain reaction and between duality and singularity or vise versa. Probabilities arise due to variables affecting the paricles inherent characteristics. There will always be many probalities but in the end it will come down to two main probabilities. Which probabilty that would be chosen would be determined by the circumstances and basic inherient characteristic (predetermined) of that particle. In short Quantum Mechanics cannot exist without Relativity and vise versa... and another question do all photons contain ALL the same inherent properties? I don't think so, because if they were all the same then duality wouldn't arise but they ALL must have the basic fundamental properties to create the basis of that particular type of particle which will cause singularity to arise. Wave function collapses because duality breaks down into singularity... We don't need a double slit experiment to show us because it's happening all around us... Predetermisim or Determinism? this last question leads to the thought that there must be another factor at play... that factor must be what binds the two together and keeps it balanced which goes back to what, how, where, when and why that particle was created?... (and who?)

[jjasper]

This is one of the better videos on the subject, i'd still like more details on the observation aspect, does distance of obervation equipment matter, why does this even happen when detection equipment is placed and not when we observe it with our eyes?

[lawui]

This is something i have to dabble into more..Can you recommend any good
books or other sources?

[johnnywoodward]

when light travels 13.6 billion years through the universe around planets and other stars through space and we finely see it. Is it a wave or a particle?

[sabeehb]

Great video. Raises some questions below. Also by the way am shocked that the science fiction called MWI ever got far enough to be a theory, is complete nonsense but great for movie makers !!

1) if anyone who truly knows can you please advise on and I have NEVER ever seen explained in any double slit video, is this. When you pass a single photon or other particle through the double slit to my mind there should be absolutely nothing on the screen - why? Because to do a fair experiment you MUST aim the laser at the middle of both slits and there we have the BARRIER not a gap !! So surely the other incredible result of the experiment is that the photons path BENDS towards one of the slits so is not traveling in a straight line. Think about it, by rights the photon should hit the barrier and simply be absorbed as the barrier is huge compared to the photon aimed at it.

If in reality you aim the laser at one slit for a few photons then move its aim to the other slit etc .then it is no longer a double slit experiment but a single slit experiment. The electron is not deciding at all which slit to go through, you are by default aiming at one of the slits.
WHY does not a single physicist explain this? Why has everyone missed this obvious point ? And of course what is the answer?

2) could the observed phenomenon be something to do with the source of the particles - i.e. if we fire single electrons what if inside the laser the electrons are already linked as a wave. So on firing them out singly in reality they are still in wave form with each other?
Has anyone tried these experiment but with 2 sources of electrins? And very spread out in time e.g. one electron per hour?

[matthewmurdock]

Another crazy thing is the delayed choice modifications of the double slit experiment. With that they'll have crystals next to the slits that split photons into entangled pairs so if you know the state of one you know the state of the other and basically know what slit they took after the other photon in the pair hit the backwall. One goes to the back wall and the other goes to the detector AFTER the other one hit the backwall. Yet in that case the interference pattern disappears as if it never traveled as a wave. If the copenhagen interpretation was correct this should be impossible if it traveled as a wave the act of detection afterwards shouldn't matter. Then there is the quantum erasure modification where it is basically the same as that but which path info about what slit the photon comes from is scrambled and the interference pattern emerges again! These modifications show any wavefunction collapse interpretation WRONG!
So I think the modifications prove many timelines and/or branching spacetime interpretations. Other interpretations try to propose retrocausal effects to explain the delayed choice modifications and they completely fail at that. But it is much more reasonable to assume that this is about information distingushing multiple otherwise identical environments. Hence the many timelines interpretation.

[williamwalker]

Relativity is just an optical illusion, and because all of modern physics is based on Relativity, modern physics is fundamentally wrong and needs to be rethought. Relativity has a simple built in logical fallacy, and no theory based on a logical fallacy can be true, no matter how many experiments seem to prove it, or how many people say it is true. Below is a very simple logical argument highlighting the logical fallacy, using the same terminology Einstein used to derive Relativity.

According to Relativity, observers on a moving train and on a stationary train platform will disagree on the size of the ""Train"" and the passage of time on the ""Train"". This is a complete logical contradiction if the size and the passage of time of the train are real. If the size of the train is real, then the ""Train"" can not be both contracted and not contracted. The same goes for the observed passage of time on the ""Train"". If these effects are observed, then the only possible conclusion is that it is an optical illusion. Things that are real must appear to be same from all frames of reference. If not, then by definition it is an illusion.

Again the argument is very simple and it is the argument Einstein used to derive Relativity, and no acceleration is used in the argument. A train with length (L) traveling at constant velocity (v) relative a stationary observer on a station platform. According to Relativity, the stationary observer will see the train contracted (L/r, where r is the Relativistic gamma), whereas an observer on the train will see it not contracted (L). So the train is both contracted (L/r) and not contracted (L) depending on the observer. This is a complete contradiction (L not equal L/r) and can not be true if length is real. The same argument applies to passage of time on the Train, where both observers will disagree on the passage of time. If time is real, it can not be both dilated and not dilated (T not equal rT). If space and time are observed to be both large and small simultaneously for one inertial reference frame, such as the ""Train"", then it must be an optical illusion.

This argument is only the tip of the iceberg. There is much more evidence including both theoretical and experimental, so please keep reading. Hi my name is Dr William Walker and I am a PhD physicist and have been investigating this topic for 30 years. It has been known since the late 1700s by Simone LaPlace that nearfield Gravity is instantaneous by analyzing the stability of the orbits of the planets about the sun. This is actually predicted by General Relativity by analyzing the propagating fields generated by an oscillating mass. In addition, General Relativity predicts that in the farfield Gravity propagates at the speed of light. The farfield speed of gravity was recently confirmed by LIGO.

Recently it has been shown that light behaves in the same way by using Maxwell's equations to analyze the propagating fields generated my an oscillating charge. For more information search: William Walker Superluminal. This was experimentally confirmed by measuring radio waves propagating between 2 antennas and separating the antennas from the nearfield to the farfield, which occurs about 1 wavelength from the source. This behavior of gravity and light occurs not only for the phase and group speed, but also the information speed. This instantaneous nature of light and gravity near the source has been kept from the public and is not commonly known. The reason is that it shows that both Special Relativity and General Relativity are wrong! It can be easily shown that Instantaneous nearfield light yields Galilean Relativity and farfield light yields Einstein Relativity. This is because in the nearfield, gamma=1since c= infinity, and in the farfield, gamma= the Relativistic gamma since c= farfield speed of light. Since time and space are real, they can not depend on the frequency of light used. This is because c=wavelength x frequency, and 1 wavelength = c/frequency defines the nearfield from the farfield. Consequently Relativity is an optical illusion. Objects moving near the speed of light appear to contract in length and time appears to slow down, but it is just what you see using farfield light. Using nearfield light you will see that the object has not contracted and time has not changed. For more information: Search William Walker Relativity.

Since General Relativity is based on Special Relativity, General Relativity must also be an optical illusion. Spacetime is flat and gravity must be a propagating field. Researchers have shown that in the weak field limit, which is what we only observe, General Relativity reduces to Gravitoelectromagnetism, which shows gravity can be modeled as 4 Maxwell equations similar in form to those for electromagnetic fields, yielding Electric and Magnetic components of gravity. This theory explains all gravitational effects as well as the instantaneous nearfield and speed of light farfield propagating fields. So gravity is a propagating field that can finally be quantized enabling the unification of gravity and quantum mechanics.

The current interpretation of quantum mechanics makes no sense, involving particles that are not real until measured, and in a fuzzy superposition of states. On the other hand, the Pilot Wave interpretation of Quantum Mechanics makes makes much more sense, which says particles are always real with real positions and velocities. The particles also interact with an energetic quantum field that permeates all of space, forming a pilot wave that guides the particle. This simpler deterministic explanation explains all known quantum phenomena. The only problem is that the Pilot Wave is known to interact instantaneously with all other particles, and this is completely incompatible with Relativity, but is compatible with Galilean Relativity. But because of the evidence presented here, this is no longer a problem, and elevates the Pilot Interpretation to our best explanation of Quantum Mechanics.

*YouTube presentation of above argument: