The double slit experiment involves passing light through two parallel slits to demonstrate that the light from one slit interferes with that from the other.

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Double slit experiment with a single photon stream

I would like to know if the following are true: Each time you fire a single photon, only one dot appears on the back screen. Is there ever a case that while we are watching the experiment, that a ...
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reproducing double-slit experiment with sunlight

Is it possible to reproduce Double-slit experiment at home with sunlight probably in a larger scale? Thanks for all the answers (and special thanks to Chris for the effort),so i understand that it ...
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What are the exact setups to observe a wave function and its collapsed state?

I was reading this article: http://io9.com/5528321/how-smart-do-you-need-to-be-to-collapse-a-wave-function and I need some clarification on the experiment setup. My current understanding is that if ...
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Has the double-slit experiment been performed with animals as the observers?

As the title says, has the double-slit experiment been performed with animals (not humans) as the observers? If yes, which animal was used and what was the result?
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At what point do quantum wave functions collapse? [duplicate]

At what point do quantum wave functions collapse? Let me give you two examples to make that question more clear: Let us think of the double slit experiment. We humans see the light at certain ...
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52 views

Inconsistency in illustration of double slit experiment?

So I have 2 questions: 1) In the following drawing, it seems to me that for a concentration spot to show up in the center of the receiver (orange dotted lines), the width of the emitter must be ...
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196 views

Derivation of equation of path difference in double slit

$p$ = Path difference $r$ = Distance travelled by the rays $x$ = Perpendicular distance between interference of the rays to the medium point of the incident rays $a$ = Vertical ...
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2answers
60 views

Can you predict the path of a particle headed for 2 slits?

In the Double Slit experiment, particles are shot at 2 slits. We know that the particles will show a striped pattern on the screen if unobserved, but show up directly behind the slits if observed. I ...
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294 views

Why is the shape of the fringes in Young's double slit experiment hyperbolic?

Why is the shape of the fringes in Young's double slit experiment hyperbolic? Morever what type of fringe pattern is obtained if slits are almost perpendicular to the screen? Can someone explain ...
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1answer
52 views

Relationship between the the slit width $w$ and source distance $d$ [closed]

I read in a text of optics Eugene Hecht where i got that, missing fringes in a double-slit interference experiment results when diffraction minima cancel interference maxima. Is there any ...
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41 views

High energy photon collapsing into its own black hole

If I did not mess up the math, a photon with a wave length of $$ \lambda = \sqrt{2\pi}\, l_p$$ where $l_p$ is the Planck length has a mass (energy/$c^2$) of $$ m = \sqrt{2\pi}\, m_p$$ where $m_p$ ...
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In diffraction process, how to describe the edge in the sense of particle-wave duality?

In diffraction experiments photons show behind an edge intensity distributions in the form of fringes. It seems to be without doubt that the edge is a part of the game. My question is, how to describe ...
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81 views

Uncertainity principle and double slit experiment?

My Understanding of uncertainty principle goes that if some particles are in same state, then their measurement of certain property (say $x$ and $p$) will be different for different particles. ...
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4answers
420 views

Clarification about Wave-particle duality

Okay,so I am learning about the double slit experiment done with electrons. I saw this picture, which shows the interference pattern being built up slowly with increasing number of electrons: I ...
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0answers
64 views

Is there a video of a double-slit experiment using walking oil droplets (aka dotwaves)?

I've heard there have been experiments with walking droplets in a double-slit setup, and I've seen videos of many of the other quantum phenomenons walking droplets can emulate, but I can't find one of ...
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2answers
70 views

Question about the double slit experiment 2

I had wondered if anyone has ever tried doing the experiment with molecules, then I came across this webpage ( http://www.livescience.com/19268-quantum-double-slit-experiment-largest-molecules.html ). ...
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1answer
420 views

What is the wavefunction of the Young Double Slit experiment?

I have never seen the wavefunction for this experiment and would like to know how to derive it using the Schrodinger equation. I specifically want to see how the electron wave function leaves the ...
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45 views

A problem in deducing $|\psi(x)|^2 \propto \cos^2(\pi sx/\lambda z_o)$ in diffraction by two slits experiment

In Quantum Mechanics for scientists and engineers by David Miller, he explains the diffraction by two slits (page $13$) and considers a beam of electrons whose wave function is $\psi(x)= \exp(ikr)$ ...
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4answers
94 views

Probability of getting through a slit

In a double slit experiment with electron we cannot know which slit the electron went through. If we measure it then the interference pattern disappears. Is it possible to get a probability for ...
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1answer
126 views

Double slit experiment exposed?

http://www.pnas.org/content/109/24/9314.full This experiment seems to show that the experimenters know that the photon went through just one slit and still observed an interference pattern on the ...
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1answer
66 views

In double slit experiments of particles (quantum) which the result is interference pattern, How many particles reach the observing screen?

I mean, I know the particles that reach the screen are going both/neither/either of slits and interference with themselves but statically/percentage how many particles interact with slits, are there ...
2
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2answers
163 views

Do our eyes act as observers at the quantum level? [duplicate]

This is a very high level question. I was just thinking about the idea than in quantum physics, the act of observing has a "strange" effect on some properties (e.g. double slit). If I'm staring at a ...
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165 views

In the double slit experiment, what is the position and momentum of a particle?

Is the position of an electron/photon which slit it went through? And the momentum of the electron/photon the wave-like interference pattern detected on the detector screen?
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1answer
164 views

In double slit experiment how do we observe electrons near slit? [closed]

If we observe the electron near the slit, does it produces two bands instead of interference pattern. Also how do we observe electron. Is it by producing electric field. Also does double slit ...
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1answer
288 views

Why does moving the source-slit closer to the double-slit plane decrease the sharpness of the interference-pattern?

Thomas Young used a single-slit plane before the two-slits plane in order to make the light source coherent. My book (NCERT Physics II) presents the above query and writes: Let $s$ be the size ...
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320 views

Why does increasing/decreasing the distance between two fringes, decrease/increase the fringe-width in interference pattern?

I am talking about this equation $$w= \frac{D\lambda}{d} \\\ \text{where}\; D= \text{separation between the slits & the screen}\\\ d= \text{separation between the slits}\\w= \text{fringe-width}$$. ...
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Observers in a Double Slit Experiment

Does it matter what the observer is in the double slit experiment? Could it be anything from an ant to a dog? Has it ever been tried with a non-human observer?
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A follow up on “Double Slit Experiment in a Bubble Chamber”

The exact title is "Has a double slit experiment ever been done using a track chamber or even contemplated?". I was totally unfamiliar with the concept of the bubble chamber, so I did some amateur ...
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1answer
142 views

Double slit experiment experiment with convex lens?

In one version of the double slit experiment, the experimenters placed a convex lens far away from the two slits. After the individual photons passed through the two slits they then travel to the the ...
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31 views

Does the double split experiment set boundaries to the concept of localization?

Feynman's textbook on quantum mechanics starts with the double split experiment for single electrons, see chapter 1-5. The astonishing result is the self-interference of the single electron as long as ...
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58 views

A real 'two line' (non-interference pattern) when observed

I have seen many interference patterns from double slit experiments but I have never seen a real 'two line' pattern when observed. Does this actually exist or is it only a conclusion? if there is an ...
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1answer
36 views

Do we know which slit the photon went through in Afshar's experiment?

I've been reading up on this experiment and it seems to be that even measuring the photon to only go through one of the slits, it still creates the interference pattern. Do we really know which slit ...
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Wheeler's delayed choice experiment?

when we remove the detector screen and use the telescopes to see which slit the photon went through, when do the telescopes detect which slit the photon passed through? Do they detect them a soon as ...
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120 views

Appartus for Young's double slit?

I am wanting a full description of an apparatus used for Young's double slit (not necessarily the one that Young himself used though), which takes monochromatic light (though not laser light) and ...
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110 views

Using the double slit experiment to prove or disprove the de Broglie-Bohm pilot wave theory

Probably a dumb question... If you have a double slit experiment with a second experiment (single or double slit) at 90 degrees intersecting the path of the first experiment, would the interference ...
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1answer
190 views

Probability and double slit

if a beam of identical particles at random distances from each other (or exactly 1/2 lambda between each other) travelling with the same v towards a double sllit do not interfere with each others wave ...
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How to arrive on the diffraction pattern for the double slit experiment using path integrals for the Gaussian slit case?

I wish to take the path integral route to derive the diffraction pattern for the double slit experiment using the Gaussian slits as the nature of the slits. The kernel looks like: \begin{equation} ...
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1answer
99 views

Can the wall in the double-slit experiment be considered to perform a “half measurement”?

When talking about the double-slit experiment, most physics books consider the wall to be a infinitely high potential, so that the photon is either reflected or transmitted through one of the slits. ...
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29 views

What is the kernel for a double slit experiment? [duplicate]

In the book path integrals by Feynman and Hibbs, the author has established the kernel for a single slit in the Gaussian form. How can I find the kernel for a double slit in a similar fashion as ...
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1answer
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Why are these two angles the same? [closed]

I can't find no similar or other relations between the two triangles, the two right triangles. However, if I look at it this way, the two triangles are indeed similar. But then this is a whole ...
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1answer
260 views

Is the formula, for finding the distance between two slits, my books gives correct?

In my book'a section on Young's double-slit experiment, the formula, $d = m \lambda \sin\theta$, is given. In this equation $d$ is the distance between two slits, $\lambda$ is the wavelength of light ...
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1answer
126 views

Is this diagram, concerning Young's double slits, inaccurate?

"This diagram" : My question is whether those lines (interference) have to originate from a single point. The diagram used to demonstrate what $m$ (path difference) means, has two lines originating ...
2
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2answers
255 views

Do atoms behave like waves? [duplicate]

I've heard someone state that the double slit experiment can also be done with atoms, not just electrons or photons of light.
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3answers
257 views

Concerning the dark bands in the light “wave” interference pattern

I'll begin with a with a brief and familiar example to frame the question: |_>EXAMPLE ...
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55 views

Circular polarisation destroying interference pattern for double slit

I have been trying to mathematically explain the empirical result that putting orthogonal polarisers (quarter-wave plates) behind the two slits of a double-slit setup will erase the interference ...
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Double-slit experiment: Difference between observing photon path and interference pattern?

This is something that has confused me whenever I read about the double-slit experiment. When the double-slit experiment is performed, I understand that the resulting pattern for the sequentially ...
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1answer
127 views

How can i only shine/shoot one proton/electron per second? [duplicate]

I would like to test out the two slit experiment but only one electron or proton at a time. This question is different from the rest that people are saying are duplicates as I am clearly asking how ...
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4answers
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Isn't the 'slit' in a double-slit experiment also a wave?

I'm new to QM so excuse my naivety. I was watching an online MIT QM course that described the double-slit experiment (with electrons) when it occurred to me that I have a question. In the video, the ...
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5answers
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Is double-slit experiment dependent on rate at which electrons are fired at slit?

I am a mathematician and I am studying string theory. For this purpose I studied quantum theory. After reading Feynman's book in which he described the double-slit experiment (Young's experiment) I ...
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Has a double slit experiment ever been done using a track chamber or even contemplated?

I tried searches and the question has been posed in other fora, but no experiment came up. Track chambers (cloud chambers, bubble chambers , time projection chambers, solid state detectors like the ...