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Questions tagged [double-slit-experiment]

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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Altering Young's double slit experiment due to observation

The interface pattern on the screen is altered due to our observation, but how could this happen, as we have been watching it since we started the experiment? Is there any other meaning of '...
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Can you use the quantum eraser experiment to send messages the past?

Full disclosure, I'm just a noobie watching YouTube. In the quantum eraser experiment you can observe the interference pattern if you erase the information on whether what you're observing is a wave ...
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Quantum Double slit experiment with 2 detectors

In a double slit experiment with electrons i have read that if you put a detector at one of the slits, the interference pattern disppears. What if i put on both the slits? I would think it will still ...
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In the Quantum eraser experiment, Why doesn't detector D1 or D2 cause wave function collapse?

I thought measurement at detectors is what collapes the wave function. So why aren't these detectors causing collapse? Why is there an interference pattern?
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Intensity of fringes in a Double Slit experiment

I have learnt that the intensity of fringes in a double slit experiment depends on the following formula: $$I = 4i\cos^2(\delta/2)$$ But it turn out that the intensity of th consecutive fringe ...
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1answer
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Does interference pattern depends upon the material used to make slits?

Is the interference pattern independent of the material from which the slits are made or is it dependent upon the type of material in some way?
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Young Double Slit Experiment Formula - Nodal Lines

Some sources use the formula $\frac{X_n}{L}= (\frac{(n-\frac{1}{2})λ}{d})$, while other sources use $\frac{X_n}{L}= (\frac{(n+\frac{1}{2})λ}{d})$ when talking about destructive interference. Why is ...
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Casimir effect in the double slit experiment

Has anyone to your knowledge, ever detected, or perhaps just tried to detect, a Casimir effect between the plate (with the slits) and the screen behind in the double slit experiment?
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Double Slit Experiment with Slits at Different Distances from Light Source

In all descriptions of the double slit experiment I have seen the slits were mirror-symmetric to a hypothetical plane that is orthogonal to the slits and contains the light-source. Question: have ...
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1answer
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The function of the pinhole in the double slit experiment

Even with incoherent light from the sun and not having any laser, Young achieves a result by reducing the incident light to a point-like source. This makes sense because a wider beam works like many ...
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2answers
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interpretation of double slit experiment

If you do the double slit experiment with a laser beam, you get an interference pattern; as light goes through different paths and the phase shift leads to constructive and destructive interferences. ...
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Double slit experiment- light intensity

The standard explanation for the interference pattern is one of constructive and destructive interference between the light waves from the two slits. But, am I right in thinking that light intensity ...
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In Young's double slit experiment, can there be an even number of maxima in the central envelope maximum?

In Young's double slit experiment, can we get an even number of maxima in the central envelope maximum? If so how and why the regular modelling of the double split interfaces is with an odd number ...
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In the double-slit experiment of electrons (observed by photons), is it correct to say the collapse is caused by the momentum of the photons?

I'm working off the article, The Double Slit Experiment Demystified. Disproving the Quantum Consciousness connection. I think it's well-written, but I'm not convinced about this part: So what is ...
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YDSE - coherence of light from slits and width of slits

In Young's double slit experiment, 2 slits act as coherent sources. Why is coherence lost when the width of the slits is greater than half of the fringe width, i.e, if slit width is greater than the ...
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In the double-slit experiment, why is it never shown that particles may hit the space between or outside the slits?

In depictions of the double-slit experiment that model the photon or electron as a particle, i.e. when attempting to measure which slit the particle passes through, it always shows the particle ...
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What does a basis rotation correspond to physically for linear position-momemtum?

For polarization and angular momentum, rotating the basis corresponds to a very straightforward physical transformation, namely, the physical rotation of an experimental apparatus about an axis in ...
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Many World's Hypothesis [closed]

According to the Many Worlds interpretation of quantum mechanics by Hugh Everett, taking the double slit experiment as an example, every possible outcome that can happen does happen. And the chances ...
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Time variable in a quantum eraser

Hello, On the image above you'll find the display for the double slit "delayed choice quantum eraser" by Scully. I use this experiment for my question as it cames through trying to understand it. ...
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How to transform the irradiance image on the screen in the double-slit experiment back to electric field in order to perform Fourier Transform?

Say I perform the double slit experiment while meeting the requirements of the far-field. I get some interference image on the screen (where R is great, as mentioned). This image is correlated with ...
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1answer
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Question about the shift of patterns in the Delayed Choice Quantum Eraser

In the double-slit Delayed Choice Quantum Eraser experiment by Scully with the installation in the figure below, as in Wikipedia, when a photon hits D4 or D3 the intricated photon hits D0 with a ...
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1answer
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How acts a Double slit with a clock?

We have the simple arrangement of the double slit, but with the addition of a precise clock. The screen is also substituted by a CCD camera, so one can check when there is an event (hitting of the ...
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1answer
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What is an “observer” in quantum mechanics? [duplicate]

i read about the electrons double slit experiment, when both slits are open, electrons will form an interference pattern, but when there is a detector put to "observe" this weird behaviour, the ...
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1answer
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Comparison between X-ray diffraction and slit experiment

Most diagrams regarding X-ray diffraction suggest that after hitting an atom, X-ray would get reflected. But then the method results in an interference pattern which means X-ray get diffracted. I am ...
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3answers
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What constitutes measuring in the double slit experiment? [duplicate]

In the double slit experiment attempting to measure which slit the particle passed through causes the wave function to collapse. According to the question: What is the quantum mechanical definition ...
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1answer
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Bohm's view of double-slit experiment, wave-particle duality

I gather that Bohm denies the notion that the act of measurement decides whether a photon will be a wave or a particle. Bohm's idea seems to be that the photon is always a particle with a real ...
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Alternative Delayed Choice / Quantum Erasure Experimental Configuration

In every experimental setup of the Delayed Choice and Quantum Erasure experiment that I've seen, the choice of what complementary property to measure or whether to include the second beam splitter ...
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Two in-line double-slit experiment [closed]

Say you have the classic double slit arrangement for electrons with detectors at the slits to determine which slit an electron passes through. Then the electrons will act as particles after passing ...
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2answers
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Three slits experiments [closed]

What is the results of three slits experiments ? What is the difference between it and 2 slits experiments?? How can measure superposition by three slits experiments
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1answer
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Variation in Young's double slit experiment

In Young's double slit experiment two rectangular slits are used.What will happen if instead of two rectangular slits two concentric circular slits(of small radii) are used,the distance between their ...
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Particle travel time in the double-slit experiment? [duplicate]

In the double-slit experiment, each bright fringe is the result of waves going through both slits and reaching the screen in phase. In other words the difference between the two paths lengths is an ...
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1answer
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Question about delayed choice quantum eraser

I'm using figure 2 of wikipedia's entry https://en.wikipedia.org/wiki/Delayed-choice_quantum_eraser If the idler beam is undetected, we get a interference pattern. If it's detected, there's no ...
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Information Centric Interpretation of the Delayed Choice Experiment

The photon travels from the emmitter to the detector. Along the way it bounces off a few mirrors and off or through a beam splitter or two. This journey takes time, but only from OUR perspective/frame....
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What's a good textbook to learn about Diffraction in Optics?

I am taking a course in Fundamental of physics for Chemists, Below is the areas I want to learn Franhouofer diffraction Rectangular and circular apertures resolving power Single slit double slit ...
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Detector that represents momentum-resolved potential in the double slit experiment

In the double slit experiment, detector that is placed to track through which slit electron went represents a change in boundary conditions, as mentioned here: https://physics.stackexchange.com/a/...
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Consecutive double slits exepriment

do you know whether there are some modification of Davisson–Germer double slit experiment when we replace one screen with double slit with two consecutive screens with double slits separated by some ...
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1answer
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What is the intuitive reasoning behind a factor of 4 in the Fraunhofer double-slit intensity equation?

For Fraunhofer diffraction, the intensity of a single-slit scenario is described by the following equation: $I(\theta) = I_{o}\left [\frac{\sin(\frac{\pi a}{\lambda}\sin(\theta))}{\frac{\pi a}{\...
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Double slit experiment gun precision

If instead of a gun that the progectile can go to either slit, if a long barrel, very precise shooting device, capable of consistently shooting thru one slit. 100 % . Now the two slits are set up and ...
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Double slit experiment: What if the detector is removed before the photon reaches the slits?

I've been reading/watching a lot of stuff about the double slit experiments. I was watching a youtube video about the delayed quantum eraser experiment and it was really interesting and got me ...
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Momentum of a Quantum Wave

When single photons are repeatedly fired through a double slit apparatus, eventually an interference pattern emerges on the detector, suggesting that each individual photon actually propagates as a ...
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1answer
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When does the exchange of energy take place in the Quantum Eraser experiment?

I found this PBS video regarding the delayed choice / quantum eraser experiment, which, like all the others I've seen, states that the interference pattern generated by the photons that pass through a ...
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2answers
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Double Slit Experiment and Delayed Choice Quantum Eraser - light and time

In the double slit experiment, there's observing or not observing. You observe, and get the particle pattern. You don't observe, and get the interference pattern. Light travels at the speed of ... ...
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Binomial Distribution and the Two Slit Experiment

Are there any correlations between the probability of binomial distribution and the results of the two-slit experiment?
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1answer
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Double slit and Quantum eraser

I understood that, after the photon passes through the double slit, and before it lands on the screen, if the Quantum eraser is activated, there will appear the interference pattern due to the loss of ...
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1answer
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The opposite of interference pattern of conventional double slit experiment

Given an interference pattern which is the exact opposite of the interference pattern of the double split experiment (points where delta r = nλ (n=0,1,2,...)are totally dark and points where delta r = ...
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5answers
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Which-way experiment with electrons

Consider the double-slit experiment done with a stream of electrons, sent individually toward the double-slit screen and detection plate. A moving electron is a moving electric charge, which by ...
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Do Photons Ever Form Just Two Lines In Slit Experiments?

Are there any slit experiments where the photons only make two lines on the screen, as if they were little bullets fired though the slits? I have conducted many double and single slit experiments and ...
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2answers
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De Broglie Wavelength interpretation

I've just started learning about the double slit experiment (just in the short appendix section in Schroeder's Thermal Physics), and I'm extremely confused by this one thing: In it, out of basically ...
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3answers
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Would the double slit experiment still yield the same results if the electron were travelling really slowly?

And I mean really slow. I don't know how this would even be done, but just a thought experiment. To explain why I ask this, the way I understand the phrase "we can't know the momentum and position ...
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1answer
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What is the physical reasoning behind the mathematical derivation of double-slit interference pattern and single-slit diffraction pattern?

Why is it that there are two different equations for the minima of a single slit diffraction pattern and a double slit interference pattern? In the double slit experiment, the two slits act as two ...