[Zer0 (OP)]

Self explanatory simple doubt.

I'm guessing right at the Centre of both Slits, Right?
🤔

Ps - Does anybody else Always gets confused & unsure & checks the Dictionary for clarification on Centre/Center before typing it?
🤭

[Zer0 (OP)]

So then in the Experiment...What is the Pattern observed Right in-between both slits?

How come Particles aren't dumb enuff to just smash against the wall space between both slits?

Aren't they always supposed to behave n follow a straight path?

How do They mischievously curve n choose slits?

Also, are there any Go Throughs Observed?
Like, is there a vertical line pattern at the recording area which is also incidentally parallel to the area between both the slits?
Do They go through the Wall between both Slits?

ps - British Education & American Occupation must be making few feel right in the Middle of it.
🐸

[Halc]

So then in the Experiment...What is the Pattern observed Right in-between both slits?

The pattern appears on the target well beyond the slits. No pattern on the partition containing the slits.

How come Particles aren't dumb enuff to just smash against the wall space between both slits?

Well for one, they're not particles. A beam of light shining on the double slits will make an interference pattern on the target beyond, but it will also light up the partition thing with the slits. So light does hit it.

Aren't they always supposed to behave n follow a straight path?

That would be what actual particles would do in a classic experiment, but even large molecules (very much particles) interfere with themselves and form interference patterns on the wall. This is pretty good evidence against any particle having an actual position except when measured.
So no, only classic things behave like that.

How do They mischievously curve n choose slits?

They don't. That would be having a position unmeasured.

Like, is there a vertical line pattern at the recording area which is also incidentally parallel to the area between both the slits?

All the lines in the interference pattern are parallel to that line.

Do They go through the Wall between both Slits?

They don't verifiably take a specific path at all. Each photon is measured wherever it is measured and that's all. There's no measured path via which it got there.

[Zer0 (OP)]

But i watched a silly video in which an intellectual man did shoot Singled Out Electrons & said & showed they were going thru the Slits.

He also showed Single Point Dots of where they Hit.
Multiple Hits did make the Wave Pattern.

I'm quite sure Others have watched similar videos.
Dots appear one after another n then slowly the pattern emerges.

The Electron Beam Gun pointing Centre Right is streaming a beam of electrons in a straight line.

The Crosshair is pointed dead centre between both slits.

Maybe I'm misleading my own self here.

Are they using accurate & precise  Lasers or out of focus torchlites?

Why would a Beam curve to go through a Slit?

[Halc]

But i watched a silly video in which an intellectual man did shoot Singled Out Electrons & said & showed they were going thru the Slits.

He also showed Single Point Dots of where they Hit.
Multiple Hits did make the Wave Pattern.

Then he did not measure which slit each electron went through. Going through the slits yes, but going through a specific slit no.

Dots appear one after another n then slowly the pattern emerges.

Yes. Hard to paint a picture with just one dot.

Are they using accurate & precise  Lasers or out of focus torchlites?

Nope. Just that the electron doesn't have an exact position until it is measured. Until then, it can be measured anywhere in the universe with a know probability.

Why would a Beam curve to go through a Slit?

That would be a path, unmeasured. Again, no electron has a known position until measured.

[evan_au]

But i watched a silly video in which an intellectual man did shoot Singled Out Electrons & said & showed they were going thru the Slits.

He may as well have said:

I did shoot Singled Out photons & said & showed they were going thru the Slits.

That is because electrons and photons both have some characteristics that behave like waves and some characteristics that behave like particles: "Wave/Particle Duality".

We have different ways of producing them, they have different wavelengths and different detectors, but they both produce an interference pattern behind the slits.

If you understand the interference pattern for photons, you have the basic knowledge needed to understand the interference pattern for electrons and Buckyballs.

[Zer0 (OP)]

Couldn't find That silly video on Utube.
👎

Did find an interesting one by
Prof. Al - Khalili.

Thanks Copyrights & Credits -

Watched his Series on the Quantum World.
Remarkeable!
👍

Did Not understand Why thou did He present & showcase the 2 Slit Exp. in such a mystical tone.
Perhaps it's a requirement nowadays to have to entertain the lay audience a bit inorder to teach them a thing or two.
Prapz He has made a follow up video Debunking the Mysticism behind the 2 slit exp.
Maybe it's on Utube Premium.
I got no access so can't say.
✌️
(The Full Lecture link is provided in Video Description if anyone's interested)

So passing a superpositioned wave of particles through a double - slit & observing an obvious wave pattern in the background is unexpected?

The moment a particle is measured, the wave function collapses.
Duality.

By the way, Why does He say Atoms?
Why not photons or electrons or just particles.
Atoms ? Duality ?

[Halc]

So passing a superpositioned wave of particles through a double - slit & observing an obvious wave pattern in the background is unexpected?

I couldn't find where he said that word. It is expected now, but wasn't when all this was first discovered, sure. It isn't expected if you use classical rules, which means there is no classical explanation.

The moment a particle is measured, the wave function collapses.
Duality.

The duality refers to things having both particle and wave-like behavior, but not being exactly either, which is actually good since both particles and waves are classical things.

By the way, Why does He say Atoms?

They shoot atoms (fairly large molecules even) through the slits and still get the interference pattern. Turns out everything has a wavelength, even you.

[Zer0 (OP)]

So passing a superpositioned wave of particles through a double - slit & observing an obvious wave pattern in the background is unexpected?

I couldn't find where he said that word. It is expected now, but wasn't when all this was first discovered, sure. It isn't expected if you use classical rules, which means there is no classical explanation.

Yes, the video upload is approx 8 years ago.
👍

By the way, Why does He say Atoms?

They shoot atoms (fairly large molecules even) through the slits and still get the interference pattern. Turns out everything has a wavelength, even you.

🙄

Prof. Al - Khalili has a book on Quantum stuff.

He mentions in the Full Lecture video that His favourite or one of his Favourite Quote is printed at the back of his book.


" If you are not astonished by Quantum Mechanics, then You have Not understood it! "
Niels Bohr


So...Atoms...singled out streamed in a straight line one after the other, aimed right in the centre point of both slits, still pass through & end up making a Wave Pattern.
For Real?
😯

Hmm...so, i do not understand quantum mechanics.
WoW!

[Colin2B]

So...Atoms...singled out streamed in a straight line one after the other, aimed right in the centre point of both slits, still pass through & end up making a Wave Pattern.
For Real?
😯

Hmm...so, i do not understand quantum mechanics.
WoW!

In a practical experiment even a laser beam has width and has to be able to illuminate both slits. If you had a very, very narrow beam then it would only illuminate one slit which is not the point of the experiment.
Yes, as @Halc says some photons/light do hit in between the slits and this is either reflected or absorbed.
It’s important to remember that even when going through one slit the pattern on the screen is not a single point, but an interference pattern with bands either side of a larger central band. This shows that the photon is not behaving like a little ball or bullet. You even get a pattern around the edge of thin (sharp) objects like razorblades.

I think you are trying to look for a cause or reason. You won’t get that from quantum theories as they all give probabilistic results rather than illuminating root causes.

By the way, it is ‘centre’ everyone else spells it incorrectly 

PS why is this question here, it should be in main section?

[Bored chemist]

The Electron Beam Gun pointing

It's important to realise that, on the scale of the two slits, the beam is wide.
It's a shotgun, not a sniper's rifle.

[hamdani yusuf]

Quantum interference experiments with large molecules
Olaf Nairz,a) Markus Arndt, and Anton Zeilingerb)
Institut fu¨r Experimentalphysik, Universita¨t Wien, Boltzmanngasse 5, A-1090 Wien, Austria
Received 27 June 2002; accepted 30 October 2002

http://cms.iafe.uba.ar/carmen/docencia/interferencia_fulereno.pdf

Wave–particle duality is frequently the first topic students encounter in elementary quantum
physics. Although this phenomenon has been demonstrated with photons, electrons, neutrons, and
atoms, the dual quantum character of the famous double-slit experiment can be best explained with
the largest and most classical objects, which are currently the fullerene molecules. The
soccer-ball-shaped carbon cages C60 are large, massive, and appealing objects for which it is clear
that they must behave like particles under ordinary circumstances. We present the results of a
multislit diffraction experiment with such objects to demonstrate their wave nature. The experiment
serves as the basis for a discussion of several quantum concepts such as coherence, randomness,
complementarity, and wave–particle duality. In particular, the effect of longitudinal ~spectral!
coherence can be demonstrated by a direct comparison of interferograms obtained with a thermal
beam and a velocity selected beam in close analogy to the usual two-slit experiments using light.

Fig. 1. The double-slit experiment is the prototype experiment demonstrating the wave–particle duality in quantum mechanics. ~a! A wave impinging
on a wall with one sufficiently small slit will spread out behind this obstacle.
An explanation based on Huygen’s principle tells us that each point in the
wave front can be imagined as being a source of a spherical wavelet. The
fields of many such sources interfere on the screen and form the single slit
pattern. ~b! If we open a second slit, which sees the same wave as the first
one, the field amplitude at a sufficiently long distance from the slits drops to
zero at specific points: we observe destructive interference due to the overlap of wave troughs and hills. ~c! Which pattern can we expect if we replace
the continuous source by one that emits quanta, that is, discrete packages of
energy and/or mass that are well localized in space and time in the source?
Can a single particle as massive as a buckyball acquire information of two
spatially separate locations?

https://www.univie.ac.at/qfp/research/matterwave/c60/index.html


Here's the grating.

[Zer0 (OP)]

Thanks Everybody for comments/responses.
Illuminating!
💡

Prapz i was born feet first, no wonder it takes things a while to get to my head.
☹️

I Admit!
I did not know Atoms showcase Wave Patterns.

But hmph!
How d heck?

Wait...Atoms form variable attraction Bonds and make up Solids, Liquids & Gases.
Right?

So...in what State of Matter is the Atom itself?

Atom have Charges, Mass, Volume, Inertia n stuff.
There are ' Images ' of actual atoms through a scanning tunneling microscope.

If an Object should ideally travel in a straight path unless a force acts upon it.
If under least interference conditions, obviously not absolute vacuum.
If every single time, in a continous stream, or one after the other, singled out with time delays n intervals in the middle.

If still a Wave Pattern keeps emerging, then are there some sorta waves prevalent all over throughout the universe since it's beginning?
Is the Universe expanding in a Wave Pattern itself, or is it expanding into an already existing wave pattern fixed static background?

& Last one please.

What happens when vertical slits are made horizontal?
&
What happens when different pixelated light sources are arranged in the Wave Pattern & then light is sent like in reverse from recording wall, back through the slits, & towards the gun/emmiter/barrel...
Do all those light beams converge at the Crosshair?

✌️

[Halc]

So...in what State of Matter is the Atom itself?

The states of matter (solid, liquid, gas) is typically how the atom/molecule interacts with its similar neighbors. An atom being shot through slits doesn't necessarily have neighbors, so I suppose 'gas' is the closest state. Not 'plasma' since the atoms still have their electrons.

Atom have Charges, Mass, Volume, Inertia n stuff.

They have volume, but the definition of that kind of gets stretched with atoms and falls apart completely with smaller things.

There are ' Images ' of actual atoms through a scanning tunneling microscope.

Cool that they can do that, huh?

If still a Wave Pattern keeps emerging, then are there some sorta waves prevalent all over throughout the universe since it's beginning?

There are no waves. A wave pattern is not a wave, and neither is an atom.

What happens when vertical slits are made horizontal?

The interference pattern gets turned horizontal.

What happens when different pixelated light sources are arranged in the Wave Pattern & then light is sent like in reverse from recording wall, back through the slits, & towards the gun/emmiter/barrel.
Do all those light beams converge at the Crosshair?

No, not that. I think a similar (possibly a bit less focussed) pattern would form in the direction of  the gun, presuming there's a target there on which to project it. That pattern would be seen even if there were which-slit detectors employed, meaning it is more a classic effect, not a quantum one.

[hamdani yusuf]

But i watched a silly video in which an intellectual man did shoot Singled Out Electrons & said & showed they were going thru the Slits.

Is this it?

Here's a more formal one.

Wave-Particle Duality Explained with Double Slit Experiments - Christmas Lectures with Neil Johnson

[hamdani yusuf]

This video gives a different perspective on a more than 200 years old experiment and discusses in detail both the experiment itself, as well as the quantum mechanics behind it. In the video I show you how you can use a microscope to visualize the wave propagation and the development of the spatial probability distribution for the multi- and single photon experiment.

Contents:
0:09 General Introduction
0:58 Result preview
3:26 Experimental
5:02 Diffraction in quantum mechanics
6:19 Manufacture of the slits
7:43 Single-photon experiment theory
11:15 Single photon experiment results
11:51 The quantum mechanics of the dual slit
19:54 After thoughts on interference and "which path"
21:43 The 44 slit experiment (linear zone plate)
22:36 Result 44 slit single photon experiment

As a basis for the graphic explanation of experiment, I mostly used the "Copenhagen Intepretation" of the experiment, but then served in my own special sauce. Anyway, hope you enjoy it.

[alancalverd]

The moment a particle is measured, the wave function collapses.
Duality.

No, human vanity imposing a classical mesoscopic model (particles and waves) on a microscopic phenomenon. The collapsing wave function is a mathematical model of what happens, not a statement of fact.

[hamdani yusuf]

The moment a particle is measured, the wave function collapses.
Duality.

No, human vanity imposing a classical mesoscopic model (particles and waves) on a microscopic phenomenon. The collapsing wave function is a mathematical model of what happens, not a statement of fact.

What do you think is the correct statement of fact?

[alancalverd]

The spatial distribution of photons and massive particles downstream of a multipath filter can be predicted by a wave interference model.

[hamdani yusuf]

Does the thickness of the material of the slits affect the spatial distribution?
What would happen if the slits have different width?