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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Primordial black hole double-slit thought experiment

Imagine the double-slit experiment where the particles emitted were black holes the mass-energy equivalent of sub-atomoic particles. Would they form an interference pattern?
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How can we derive an equation for double slit interference without the approximations made? [closed]

I'm referring to: $$s = D\lambda/d$$ Where $s$ is the distance to the first constructive interference (CI) from the central line, $D$ is the distance from the point sources to the screen, $d$ is the ...
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In the double slit experiment, when a particle is bombarded between two slits, why doesn't it "always" hit between the two slits and not pass at all? [duplicate]

The alignment is always towards the centre of the area between two slits.
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Shouldn't it be $d\sin\theta=\frac{\lambda}{2}$ here instead of $d\sin\theta=\lambda$?

Question: The width of a slit is $4\times 10^{-4}cm$. The wavelength of the light used is $6000 A^{\circ}$. What is the angular distance between the two minima of first order on both sides of the ...
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Law of conservation of momentum and interference [closed]

There are two guns a and b that emit electrons simultaneously. Electrons meet at a point с ...
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Double slit experiment: how to derive the figure of interference?

We know that by performing the Double Slit Experiment we get an interference pattern on the detector screen. To explain this most sources talk about the state of the particle: calling $|\psi _l \...
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If the Many world interpretation is correct, is a single observer "privileged" in the experienced world?

I've been interested lately in the many worlds interpretation of quantum theory - it seems like the most straightforward and likely formalism that exists. As per this theory, when an observer observes ...
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When does the bright fringes of two rays of different wavelengths coincide in a double slit

Two light rays of different wavelengths are allowed to pass through double slit. What is the least distance for which the two bright fringes coincide. I have seen a example where a ray makes a bright ...
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Tandem double slit experiment (similar to quantum eraser in setup)

Say you have two double slit experiments, DSA and DSB. Each has a photon source and the work is expected producing interference patterns that would can be observed by only looking at DSA or DSB they ...
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Ok, so I understand why an electron would change while being observed. But does it change exponentially when being observed by more than one person?

Ok, so I understand why an electron would change while being observed. But does it change exponentially when being observed by more than one person? Say having 10 or 100 observers.
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Number of Fringes obtained on Interference of Lights of different Wavelengths

The Question goes as follows: I am stuck at the part where we obtain General Equation for Path Difference of two Interfering Lights. Since Wavelength of those Interfering Lights are different, so I ...
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How does a single slit produce coherent light?

I was wondering why some apparatus seem to place a single slit right before a double slit. Then I saw this this question. The answer explained it quite well; but I still don't quite understand how a ...
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Intensity of Two Slits of Finite Width Pattern

I am a college sophomore in an introductory E&M course. Young & Freedman presents the resulting diffraction/interference pattern when shining monochromatic light through two slits of finite ...
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Why don't two identical monochromatic lamps form interference patterns?

Monochromatic light of intensity I from two identical lamps is incident on a screen. How will the intensity vary with distance, x, from the center of the screen. From my knowledge of Physics, I would ...
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Double-slit interference pattern from double-slit diffraction pattern in the limit of zero slit-width

The intensity pattern of the double-slit experiment should change from the double-slit diffraction pattern $$I=4I_0{\rm sinc}^2\left(\frac{\pi b\sin\theta}{\lambda}\right)\cos^2\left(\frac{\pi(b+d)\...
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How would Young's Double Slit Experiment change if we use light of different wavelengths? [duplicate]

Suppose we use light of two different wavelengths (say blue light and green light) in the two slits of Young's Double Slit Experiment. What sort of interference pattern would one observe?
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Making aweak measurement

Weak measurements are used to probe a quantum system that is still in a superposition of states. My question is how do physicists proceed to (cautiously) make such a measurement, eg in the double-slit ...
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Difference between the wave forms in the water and in the Young double slit experiment

We can observe when we cause a slight disturbance at two points on the water surface which is intially totally undisturbed , it will form water waves which would look like as shown in below image: we ...
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Extended source problem while causing to show the chances to form the intereference pattern

We know waves are emitted from a extended source such as sodium lamp will have waves getting emitted at different times due to variable time it needed for to excite electrons in the sodium atoms . But ...
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Young double slit experiment superimposition aftereffects

Consider a Young double slit experiment we know that waves superimposition is what causing constructive and destructive interference but while showing that consider two waves superimposing at a point ...
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Interference pattern double slit - exponential electric field

So I am trying to prove that the intensity received at a screen from a light point source through two slits is $I(x)=cos^2(\frac{\pi ax}{\lambda D})$. I know that the electric field at screen is $E(x)=...
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Are there any event (whether micro or macro) with only one possible outcome? [closed]

I'm honestly confused with how quantum mechanics works. Does the double-slit experiment indicate all events have more than one possible outcome? If that's the case, does a single-slit that shows no ...
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Does a wave function not collapse upon detection?

In Sabine Hossenfelder’s YouTube video “The Delayed Choice Quantum Eraser, Debunked”, she states that even if you detect which slit the wave function goes through (in the double-slit experiment) then ...
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Is it possible to find out coordinates of slits by interference image?

Is it possible to find out coordinates of slits by interference image? Actually I have several questions. Assume my friend gave me a stripe which shows interference picture of light (like in a ...
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Will the equations derived for dark and bright fringes remain the same in this case too, or will there be changes?

We know in YDSE experiment we calculate position of white and dark fringe by calculating the path difference using Pythagoras theorem and equating it to $n\lambda$ and $\frac{2n-1}{2}\lambda$ ...
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What happens in Young's double slit experiment and Fraunhoffer's diffraction actually?

In Fraunhofer's diffraction, is it the interference of light rays of two secondary sources in a wavefront of a primary source? And in Young's double slit experiment, is it the interference of light ...
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Double-slit experiment with entangled particles

Based on this Double double-slit experiment question, I have a setup that differs slightly: [screen 1] [double slit 1] [entangled generator] [enough space] [double slit 2] [screen 2] The entangled ...
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Double slit formula derivation. Why not $I_{\theta} = 4 I_m (\cos \beta)^2 \left( \frac{\sin{\alpha}}\alpha \right)^2$?

The intensity of the double slits is given by $$I_{\theta} = I_m (\cos \beta)^2 \left( \frac{\sin{\alpha}}\alpha \right)^2$$ where $$\alpha = \frac{\pi a}{\lambda}\sin \theta$$ $$\beta = \frac{\pi d}{\...
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Do perpendicular lights interfere on a surface?

In the following experiment, we have an observer looking at a material illuminated by a light. Imagine that the lights are similar to a laser (coherent?) so that all of the photons follow the ...
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Are longer wavelength flash "fuzzy" ? (Feynman lecture Vol 3 chap 1)

I am reading Feynman lecture volume 3 , Chapter 1. https://www.feynmanlectures.caltech.edu/III_01.html#Ch1-S8 (search "fuzzy" in page to find the concerning paragraph.) I'll quote the ...
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If light propagates like waves, why can't I see around corners?

I know two different descriptions of how light propagates in space; (1) like particles traveling and reflecting in straight lines. And (2) like waves spreading and interfering in space. And that both ...
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In the intereference in famous Young Double Slit Experiement isnt the wave pattern forming on the screen due to bending of waves only?

In the famous Double slit experiment the waves from a source hit two slits and then they get interference at the screen but isnt the interefernce along the screen due to bending of waves only ? Isnt &...
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Is it necessary to observe the pattern formed by two slits if comparable width to wavelength that rayliegh criteria needs to be satisfied?

I know the intentsity pattern formed at the screen due to the interference and diffraction bith effects taking place in this above case but to clearly see the oattern is it necessary that raylieght ...
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The probability density function for the double-slit experiment

I am desperate. I've scoured the web for the formula for the probability density function for the interference pattern obtained in the double slit experiment with both slits open. So I want to know ...
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Double-slit experiment and uncertainty principle

In single-slit experiment for electrons, it is possible to infer the uncertainty principle (Δ𝑥Δp~h) if interference pattern is interpreted as range of possible momentum of electron. As the slit's ...
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Does fringe pattern depends on width of the slits and whats the pattern look like in case of many slits?

Consider a general case where we have many slits and we are interested in the pattern effect changed on screen kept at large distance when one of these happens :1. Slit widths of all are changed a bit....
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Is the pattern shown in the background due to YDSE or something else? [duplicate]

This a photo of a image from a phone camera , we can see that there is a fringe pattern is showing up i want to know is it due to camera being acting as a double slit source or something else ? As ...
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In the Young's Double Split Experiment, how does the intensity of fringes vary with distance?

My Physics textbook introduced the topic with considerations of only the interference of the in-phase waves and leaving aside the property of diffraction for the later part. This way it plotted the ...
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Does a single photon diffract when fired at a single slit?

A beam of light fired at a single aperture produces a diffraction pattern on the screen. A beam of light fired at a double slit produces an interference pattern. Individual photons fired at a double ...
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Young's double slit and determinism

In Cohen-Tannoudji's QM book, pg. 6, the following was said about the Young's double slit experiment: Moreover, as the photons arrive one by one, their impacts on the screen gradually build up the ...
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Why are these peak intensities in Young's experiment the same?

I took the following image from the book Sears and Zemansky's University Physics with Modern Physics by Young and Freedman. I don't understand why the relation $d = 4a$ makes the peak intensities in ...
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Double slit experiment with which-way detector

Basically I am not satisfied with the answers to this question. The question is asking for records (images, videos) of the double slit experiment with a which-way detector. And although the answers ...
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Explain Elitzur-Vaidman in MWI

What happens in the experiment according to MWI? When do world splits happen in a Mach-Zender Interferometer in the many world interpretation with a dud bomb? At the first mirror? Then how come the ...
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In the Double Slit Experiment, what is the longest time $T$ recorded between shots of particles, electrons, photons, etc.?

How can we be certain that electrons fired do not leave some kind of residual interference for the next shot? What is the longest time recorded between shots?
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What is the physical interpretation of the wave function in the Many Worlds Interpretation of Quantum Mechanics?

In the Copenhagen Interpretation of Quantum Mechanics (QM), the mod-square of the wave function gives us the Probability Density Function (PDF) of the quantum object. Is there any such meaning for the ...
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Is my understanding of the double-slit experiment correct?

I'm no quantum scientist. I'm just a software engineer with a healthy (?) fascination with quantum mechanics and knowledge gained from Googling. :) I've read many different articles about the double-...
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If I made a double slit using microwave oven door, do I get an interference pattern?

Imagine the following setup: A microwave oven door with 2 holes big enough for the wavelength of microwave to pass through, high power magnetron as the source of microwave and wall of metal to produce ...
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Can molecules used in double slit experiments interact with light? [closed]

If a photon hits a molecule while it's in a wave state will it collapse it into a particle?
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DIY Experiment fiasco: Single slit laser pointer already showing interference pattern

I tried to run the double slit experiment at home for my kid with a cheap red laser pointer. I partially covered the laser with four pieces of electrical tape to make a tiny square hole. To my ...
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What is the predicted outcome of this quantum eraser experiment?

This YouTube video demonstrates a doable-at-home quantum eraser experiment. To summarize in brief, a laser is shined through a double-slit, causing an interference pattern on a white poster 3 meters ...
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