Double Slit Experiment (How to do it at home)

[rmtglass1]

Checkout rmtglass1 channel

[superb200712]

Just tell me two things! Waves are interaction of particles (water waves e.g) How can they be compared to photons (which is a single entity - quanta or quantized).

Secondly, if a particle splits in two so easily than how come we collection of billions of particle don't randomly split in two or many...how our wave function collapses to just ONE stable being?

[MinecraftingDaddio]

@superb200712 The larger an object is (conglomerate of these particles) the more difficult it is to enter, i guess you would call it, a state of superposition. This is why scientists find it extremely difficult to make a larger object, such as one you can see, into this state. There are a lot of articles online if you google it.

[rmtglass1]

Great

[rmtglass1]

Awesome

[rmtglass1]

Awesome vid!!

[therebelwaltz]

OK, honest question from a physics dummy: why didn't physicists getting SUCH weird results (1 photon going through two slits at once) question whether their apparatus was actually shooting one photon at a time like they thought it was, rather than questioning (it seems to me anyway) their understanding of reality itself?

[Acosmicist]

@therebelwaltz I have a lot of questions about the controls on this experiment too. I don't think enough controls are being implemented in these experiments.

[therebelwaltz]

@Acosmicist Well, I'm not doubting the results, 1. because I don't know physics and 2. because this experiment is pretty old, so I'm sure that for the results to be generally accepted they've asked every question they could. I'm just curious about the first physicists to do this experiment: if their results were so utterly bizarre, didn't they first question their experimental results? (For all I know, the answer is; they DID, but they progressively ruled out all such concerns)

[superb200712]

@therebelwaltz Good point. I thought of it too. But if you see the REAL EXPERIMENTAL sheets of (as claimed) single photon fired at a single time..You will notice that even the so called DARK AREAS also have PHOTONS but ofcourse the probability of photon hitting the DARK areas is quite less than BRIGHT areas. If there isn't a single photon in DARK Area whether you do ur experiment with billions of photons/electrons...than I'll believe what you said otherwise there's a problem in the explanation.

[kavetova]

I know how it happens and can explain this experiment and many others

[superb200712]

@kavetova bring it on! love to hear ur side of story.ASAP

[bheadh]

Clever. Well done. I wish I could jump to the quantum level with Dr. Quantum and those sexy college-aged computer generated lovelies.

[tlee01621]

What happens if you move the 2 slits further apart or closer together do you get the same wave like behaviour?

Also does the same thing happen if you move the slits closer to the back wall?

[hovsec]

i want to see it actually happening, we dont see where you are pointing ,i wanna actually see where you point and what the pattern then looks like

[SnowWalkerOne]

@hovsec That is what the video is about. The pattern is the video.

[GetSum63]

@SnowWalkerOne I think he means he wants to see you hit the slits with the laser as well as the wall where the laser end up...And I concur, I would like to as well...otherswise great experiment

[Vasu1494]

thx using this for my physic project

[mickycheese27]

3 SLITS !!!!!!!!

[RonBurgundy161]

Why is there an interference with a single slit?

[faithycoins]

@RonBurgundy161 Ask your Mom.

[RonBurgundy161]

@faithycoins How original, did you whip out the mom jokes book for that one?

[faithycoins]

@faithycoins Sorry, with a name like Ron Burgundy I thought you might have a sense of humor, my bad.

[therebelwaltz]

@RonBurgundy161 it's diffraction.

[Acosmicist]

@RonBurgundy161 Probably because 1. the laser he used is a cheap laser pointer, resulting in interference that is not as detectable by merely shining it at the wall unobstructed, but is significant enough to be seen through the slit; 2. the size of the slits are not precisely cut in relation to the properties of the beam(intensity, wavelength, etc..); 3. the edges of the cuts for each slit might be much thicker than desired, which may lead to undesired interference.

[MinecraftingDaddio]

@RonBurgundy161 Because he is still firing a large amount of photons which would create a wave no matter what because the photons are interfering with each other. 

[haashond]

though a double slut...

[scrog77]

Dose this have anything to do with dark matter?

[saintmichaelsarmoury]

@scrog77 No.

[FromOutsideTheBox]

That was a bit different than Dr Quantum's version ;0 I Liked it!! Great Examples... So guess Observing it had nothing to do with the pattern....hehe

[SnowWalkerOne]

@FromOutsideTheBox Yes, well, in the experiment I ran, we only saw the interference from the interaction of waves, the main difference, is you can see how much more interference there is, with two slits, and yet the source of light is the same. Now with Electrons, they prefer to be objects, and exist as wave probability functions until they encounter something, or an observer. And the observers are a test meter or something. It collapses the wave function and causes the event to be a objects.

[harpbloke]

very good video

[dtm52]

Are the nodes, crests, photons and slits bigger in Texas? I know the interference is bigger in Texas.

[Khayd4126]

@dtm52 I'm told some of the slits are :)

[dtm52]

@Khayd4126 Yeah and aren't the slits brighter in Texas?

[SnowWalkerOne]

@dtm52 Yes, brighter and bigger.

[swinewarrior]

all quantumed out man

[SnowWalkerOne]

@swinewarrior pwnage video coming up. :)

[lapkine77]

Thumbs up :

Usually, TV shows with tricks show "DO NOT TRY THIS AT HOME".

Well I can tell ya this people : you can do it IF it is Jupy approved ^^

PS : The best way I know that quantum mechanics work, is that when someone tries to explain me even the simplest theory of the domain, my brain evaporates into a billion quantum particles - like when I watch this video for instance XD

[SnowWalkerOne]

@lapkine77 The trick Lapkine is to forget everything you have ever known about much of anything, go and read Alice in wonderland, and it will make perfect sense.

[lapkine77]

@SnowWalkerOne WILL DO LOL XD

But seriously...I am not done for physics or chemistry. Never was (well, except for astrophysics for the general public, but that's the exception that confirms the rule). Biology, History, Economy and Law are better suited for me. That video was way over me heads XC

[Elenkhos]

Good vid... I thought photons where waves?

[SnowWalkerOne]

@Elenkhos They are, and they are also particles. See we really DON'T KNOW what things are, so we make up constructs, mental constructs that allow us to try and understand what is happening in this place. Things are both waves and particles. Everything is including you and me.

[BetsOnDogs]

Take the red pill, Neo, find out how deep the rabbit hole is.

[SnowWalkerOne]

@BetsOnDogs You've got to love the red pill.

[papafox]

Cool stuff. :-)

[Paxmax]

oh geez... I tought the slits needed to be smaller and closer for this to work!

Nice vid Jupy!

[SnowWalkerOne]

@Paxmax It would have worked better, if they were smaller, but as you can see, it does work.

[rozeboosje]

Fantastic. A good way to visualise it is to see the waves as probability waves. As long as you don't check for the location of a particle all you have is probability and that's how even single particles produce the interference patterns.

[johncrwarner]

Can i recommend the book "QED: The Strange Theory of Light and Matter" by Richard Feynman and I believe the original lectures are on the Internet though not here on Youtube.

He is good at explaining the current theory of QED which has some other ideas about the nature of light and matter which are weirder but more accurate.

[ybcool]

Super Cool video! You are amazingly smart! ;-)

[SnowWalkerOne]

@ybcool Thanks :), I am just a Naked Monkey, like everyone else.

[eagleeye1975]

Great video man!

[SnowWalkerOne]

@eagleeye1975 Thanks, I wanted to discuss how electrons behave in this experiment, but I know peoples heads would have started exploding.

[theflamingpi]

@SnowWalkerOne But, electrons are so much cooler in this experiment! Well, I guess they are cool or they suck in this experiment, depending upon whether or not they are being observed going through the slits.

[SnowWalkerOne]

@theflamingpi No e' are much cooler, cause they are more prone to being a object. They have an atomic mass of .005 amu, or close to that, so e' have mass, unlike photons that have no mass, so they prefer waves over objects. e' because they have mass behave as objects more than photons do. But everything including you and me, exist as both a wave function and an object.

[theflamingpi]

@SnowWalkerOne Aye. When travelling through the one slit they act as an object and when travelling through two slits they act as a wave. But, when observing them travelling through the two slits, they act as objects again. There was a nifty little video describing the process that I saw a few years ago. It was overly-simplified, even for someone who knows nothing about physics (such as myself), let alone quantum mechanics.