Double-slit ( Young ) experiment

[DEANgoton]

Isn't this Feynman's double split expirement? Young worked only with light.

[buraqh]

@DEANgoton It is true, but the experiment is called Thomas Young's experiment. The idea of using double-slit is the thing here.

[DEANgoton]

@buraqh That makes sense, I'm sorry I'm still just an amature here. 

[YouSpamTard]

it seems nobody has mention the obvious variable of ricashae

[wahrschein7]

The electron double-slit experiment is without doubt a convincing and strong reason for declaring as invalid the so called wave-particle duality which is a wrong and misleading concept in the most widely-accepted interpretation of quantum mechanics.This experiment has been accurately interpreted in the following webpage:

toequest.com/forum/physics-art­icles/5373-against-wave-partic­le-duality-concept-part-1-a.ht­ml

[AlloBruxelles]

@wahrschein7 I can't get to that page. Is he advocating wave or particle? Thanks!

[wahrschein7]

@AlloBruxelles Double-slit experiments with single photons, electrons or atoms strongly advocate the only particle theory in quantum mechanics, provided that the results of experiment to be interpreted correctly. The article “Against Wave-Particle Duality Concept” could be useful in this regard. You can google it. Thanks!

[ibajem]

This initial setup provided no way for the investigators to test whether any individual photon had gone right or left at the beam splitter. Consequently, each photon went both ways splitting into two wavelets that ended up interfering with each other at the detector.

[ibajem]

Five years after Wheeler outlined what he called the delayed-choice experiment, it was carried out independently by groups at the University of Maryland and the University of Munich. They aimed a laser beam not at a plate with two slits but at a beam splitter, a mirror coated with just enough silver to reflect half of the photons impinging on it and let the other half pass through. After diverging at the beam splitter the two beams were guided back together by mirrors and fed into a detector.

[ebutuou123]

where can i read on the details of the experiment and how they set it up and their initial conditions?

[ibajem]

@ebutuou123

on wikipedia, on any biography about thomas young (newton did it too), on the more recent laser approach, and on einstein´s solution to the photoelectric effect bringing particle-nature of light back from history since from around newton´s time, without discarding the wave-like properties of light and having his finding confirmed by the double slit experiment by shooting 1 photon/electron/particle of any kind/ through the gun at a time, like so, and seeing it interfere with itself

[nickharvey7]

Electrons like Photons only seem to exist as a wave until they come in contact with an object. Then the wave function collapses forming a discrete or quantized form of energy. If this is a universal and continuous process could it be forming the passage of time? Because each new Electron or Photon will have a unique position in space and time that the wave function never had before they made contact with an object.

[ibajem]

@nickharvey7 kind of, but each particle does NOT have a unique position in space-time (not space and time, they dont exist seperately), because the uncertainty principal states that a particle´s position and momentum cannot be known with precision, only probabilistically. the more we measure one, the more information we lose (consequently, the more we CHANGE) the other. big stuff for small minds, if you have a good mind youll catch on in no time at all.

[nickharvey7]

@ibajem Let’s put it a different way then, could Heisenberg’s uncertainty principle be the same uncertainty that we have with any future event? The flow of time would then be formed at the most fundamental level by the collapsing and reforming of the wave function forming the Einstein’s curvature of spacetime. This seems to be the simplest explanation of what is happening.

[ibajem]

@nickharvey7 In the two-slit experiments, the physicist's choice of apparatus forces the photon to choose between going through both slits like a wave or just one slit, like a particle. But what would happen,Wheeler asked, if the researcher could somehow wait until after the light had passed the two slits before deciding how to observe it?

[kevinstuartfr0st]

single slit rotating and 2 single slits merging

watch?v=vwlp9nwMueM

[darthsedious2000]

very clear

[Bowman1084]

Why didn't they show the whole experiment? The photon particals are supposed to act like a solid mass partical again when being observed. I still think it has to do with some kind of frequency or magnetic field attraction and repel given off by the measuring device.

[severuswizard]

They only act like particles when you measure which slit the single photons are going through.

[dbrckovic]

I'm wondering the same thing. There are only animations, simulations, diagrams and lectures of this effect but there is no video of the real experiment where interference patterns turned into two stripes after measuring equipment was turned on. If there is, can someone post a link?

[JimmyGris]

Louis De Broglie would be happy to see that! Thank you !

[RMProdux2008]

complete paradox. wave-particle, yin yang, my wife/my mother-in-law, good and evil, constructive destructive, chaos harmony all at the same time. you can see why an eastern mystic would be intrigued with events in the quantum world.

[TheHeathenz]

i have heard that when the information coming from the magnetic(cameras)was dumped was saved to memory the pattern dissapeared. And when the info was immediately dumped the pattern came back.

[TheHeathenz]

damn i messed that up...when info was saved the pattern disappeared and when info was dumped the pattern appeared again.. anyone hear of this?

[ZeeNwar]

The individual points on the screen (I assume) represents localization due to wavefunction collapse upon interaction with the physical barrier.

[ZeeNwar]

Actually, the results make perfect sense. As 'bck1990' mentions earlier(see below), the electrons spread out into a probability distrib. which is also a wave interference pattern. Remember, each electron is a sort of 'wavelet' really, NOT a point mass, so we should expect it to interfere across both slits simultaneously (because this is what a wave does)

[RBChoman]

As far as I know, the Particles are sent and recorded, one by one, individually.

Nevertheless, to create those Interference Fringes, the particle has to go through both paths, interfere with itself, and finally arrive on the Detector Screen as a Particle; wich can be explained by a Wave-Behaviour, but is nonsensical for a Particle (and in an instant, defies common sense).

Also Photons, Neutrons, Atoms (and Who knows what else), can exhibit this Wave-Particle Duality.

[RBChoman]

It's hard to understand the Wave-Particle duality. Thanks for the video. One got to see this video knowing that is absolutely real, in order to understand. It's totally new. Or not even.

Simple yet Unexpected.

[hl2alyx]

d*sint=n*lambda

[gersonl]

How can a particle be at all positions simultaneously!??? Impossible.

[aunit64]

its more than one electron

[user134342]

Because it's not a particle, it's a wave.

[bck1990]

defies common sense eh? its spread out into a probability distribution function. as long as u dun measure it, not fixed at one location.

[vehicar]

my brain! it hurts!

[4Micahful]

@gersonl superposition is not a particle being in ALL positions simultaneously, but rather being able to be in ANY of those positions at the time of collapse

[vi67]

This video is misleading, as:

"The observers are not robotic blinking eyes but other particles bouncing of the test particles. Yes thats right,they are physically altered by the method of observation."

[ibajem]

@vi67

ok, but even if we do not bounce test particles(/waves) on the electrons/photons/whatever, they are still being constantly bombarded by all kinds of electromagnetic radiation that is: light, radio waves, uv waves, microwaves, etc), so really we should expect the same physical alterations without the ¨observer¨ playing tag with them. this isnt the case. on another note, go try bouncing particles and getting the exact same pattern as a wave-interf grid instead of particle gibberish

[TekLok]

there this kids 3d animated cartoon on youtube abotu this, it explains it more clearly, but tis kinda goofy hahaa.

[SemaJC1]

Oh yes, slit. Erherm gemehermerm. Erm.

[SemaJC1]

The double split experiment is insane. Nice video! LET'S HEAR IT FOR PHYSICS! HOORAY!

[BigGordonLips]

how how how how???? AHHHHHHHHHHH

[DickJohnson3434]

If this is real, it's pretty fucking cool.

[popparodz54]

This is one of the most amazing videos ever created.