Double slit Definition and 825 Threads

Homework Statement In this question, when S2 is covered with a very thin glass, the fringe move toward Y . why is it so? Homework Equations The Attempt at a Solution

Homework Statement In a Younf's double slit experiment , the intensity of light at the centre of fringe pattern is I. If one of the two identical slit is now covered , the intensity at the cnetre ANS is 0.25I. Homework Equations The Attempt at a Solution In my opinion, it should...

Hi, can smart people please assist me with understanding something: why doesn't the "final" observation at the back screen create the same kind of effect as an observation made before the particle hits the back screen? Simple term please; no PhD here. Thanks.

Hello! For some time now I have been absolutely fascinated with quantum mechanics. Unfortunately for me, I am well aware that what I know of QM comes from over-simplifications specific to educational reading material and videos where a core goal of publication was to avoid the actual...

So based on String theory, when doing a Double Slit Style Experiment when an observation is made it is a particle and when on observation is not made, it is a wave pattern. What exactly do the Interference patterns mean? Basically what I research was this... Doe it means that in the...

We all remember the animations describing the double slit experiment to the public, laying out the foundations of the mysterious quantum world. Now take the part when we try to determine which slit the electron went through. The narrator will say something like this, in a hushed voice: „And...

I just saw a video about the so called "Double Slit Experiment" () which showed that two lightbeams that are parrallel will manipulate each other just like waves in a pond would do. The slits used in this experiment were very close together but you could see them with your eye so I guess they...

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I have a few problems understanding the double slit experience and the behavior of photos due to simple observation. I am not really looking for in depth explanation here (great if you have it) but more for links or references to read more about it. Here are some questions: 1. What does...

Just a simple question. How do we know the detector isn't messing up the double slit experiment when a single photon is shot out. When there is no detector we know the interference pattern is formed even with a single photon. If we add detector to see where the photon actually went through a...

So Yves Couder have these silicon droplets bouncing on a vibrating surface of some liquid: ...and apparently they can produce some things quantum particles do, like double slit fringe pattern trick. The question is how does that translate to 3D and would it still work? I mean, instead of...

Consider the classical double slit experiment where we are shooting electrons trough a double slit and then capture them on a photographic plate. We know that the pattern of electrons on the plate will differ depending on the state of knowledge of the observer. If he make a measurement to find...

I have some questions about double slit experiment. 1) Sometimes photons or electrons should bounce off the initial barrier and nothing should be detected in the plate. ¿Is this correct? i find a video saying that NOTHING is detected in the barrier, only in the plate. 2) If we put 1...

I'm not a physics major and I have only a minimal/mild understanding of physics at best, and I have a question. I've heard and read a lot of people say that using the phrase "observation collapses the wave function" is very misleading, and that it should more accurately be said that...

What would happen if the double slit experiment were to be undertaken using white light, and one of the slits was covered by a monochromatic filter (i.e. something which only one wavelength could pass through), and apart from this there was no detector monitoring which slit each photon was...

As far as I know Feynman was the first who told that if you would put detectors at the double slits the interference pattern would disappear, because of "knowing with path". But I think this specific experiment has never been done because a photon cannot be detected without absorption. So if...

If you were to take Youngs original Double Slit Experiment, with this slight variation, would you get the same results you would usually expect, i.e. an interference pattern? The variation is as follows: Instead of one source of light, there are two sources of light, positioned next to each...

Hi everyone, Lately I have been reading about the double slit experiment, I am wondering if it would be possible to recreate this experiment with visibly large objects using magnetism. The experiment I was thinking might be able to do this is as follows: There are two vertical tubes, a...

Hello, fellow physics lovers. I am an amateur physicist and am currently teaching some fellow keen amateurs about the marvels of the quantum world. After explaining the dual nature of light and conducting a very basic example of Young's double slit experiment using a laser and a sheet of card...

Ok, so I've just started studying quantum physics with the introductory double slit experiment. I thought I had a pretty good grasp on the results of the experiment but my tutor says I don't. This is what I interpreted from the experiment: Both slits are open. We place a detector along...

Homework Statement Estimate maximum slit width of a double slit. Homework Equations The Attempt at a Solution Letting the slit width be a, The intensity profile of such a system is: I = I_0 sinc^2\left( \frac{Nkasin \theta}{2} \right) cos^2\left( \frac{kd sin\theta}{2}...

Homework Statement In a Young’s double-slit experiment using light of wavelength λ, a thin piece of Plexiglas having index of refraction n covers one of the slits. If the center point on the screen is a dark spot instead of a bright spot, what is the minimum thickness of the Plexiglas...

I know this is a very trivial concept, so can someone please point out to me where I'm going wrong with this? We use coherent waves to observe an interference pattern, and coherence by definition is the presence of a constant phase difference between two waves. Yet, we see bright and dark...

Hello, I'm new here, but I've been researching this subject for several months now. I'm especially interested in the double-slit experiment performed with one electron at a time, particularly with the detection apparatus turned ON. I've found this statement, or something very much like...

What is the effect of decreasing the widths of slits in double slit experiment?

Homework Statement Two radio antennas separated by d = 294 m as shown in the figure below simultaneously broadcast identical signals at the same wavelength. A car travels due north along a straight line at position x = 1 290 m from the center point between the antennas, and its radio...

Hello, I've been trying to learn physics recently with the long term goal of understanding GR and cosmology. As a result, I have many questions, so I'll just get started.. In the famous double slit experiment, there is a coherent light source aimed at a double slit which produces an...

I'm a little confused about a small detail when finding the intensity over the screen, as some notes I'm using happen to calculate the same thing twice, with a slight difference the second time. Each method does the following Call the electric field at any point E so we have...

Homework Statement Light of intensity I0 passes through two sets of apparatus. One contains one slit and the other two slits. The slits have the same width. What is the ratio of the out going intensity amplitude for the central peak for the two-slit case compared to the single slit?Homework...

passing a black hole from double slit experiment setup Hello, Theoretically any object can convert into black hole by compressing its mass below some radius( describe by Schwarzschild Radius). Suppose one of this object after becoming black hole have radius which is comparable to atoms and...

Just a question about the naming of optical phenomena. I've taken these explanations from a book I'm using: Diffraction is when a single wave passes a slit or obstacle and spreads out. The single wave produces a diffraction pattern. Interference is when we have more than one source of...

In double slit experiments detection of individual electron has very massive effect on the result. Now suppose in dark room we perform double slit experiments with two observers (who cannot communicate with each other). Now those two observers have eyesight that can see individual electron in...

Hello, Very recently i learned about the quantum theories and the double slit experiment.. honestly i was startled from what i have seen and heard of the quantum laws known for us at this time.. Well i can't help it but my mind keeps asking zillions of questions and it's not stopping.. :P...

Hello, I have a quick question about the distinguishing features between a 'monochromatic light source' and a laser. In my notes on wave optics, I have a diagram of monochromatic light being diffracted through a single slit, to produce a coherent wave formation that then hits a double slit...

Homework Statement Explain the idea of complementarity in the context of the double slit experiment for electrons by using the Heisenberg Uncertainty principle. Homework Equations ΔxΔp ≥ h-bar/2 The Attempt at a Solution I understand the definition of complementarity but don't...

Hi, imagine setup with source of entangled photons (A and B). Photon A travels to double slit so that either wave or particle pattern can be observed, photon B hits detector either before (setup 1) or after (setup 2) photon A has hit screen. Question: Will setup 1 show interference pattern...

Hello, I am trying to recreate the double slit experiment using ordinary light, i.e. sunlight or light from a light bulb or torch. I do not wish to use a laser for various reasons. I have experimented with the distance, spacing, and width of the slits, but I cannot get an interference...

Hi all. I am just trying to get my head around the double slit experiment(I know I am not the first) I am stuck trying to understand the initial state of the individual photons when they are being fired sequentially.(their direction and place of origin)(where the quantum confusion sets in) An...

I have a disagreement with a Quantum mechanical scientist about a double slit experiment with polarizers, which gives interference or not depending on "which path" knowledge of the photon. That is alright with me, but I can calculate the same results with classical wave formula. He does not...

Homework Statement Part(d): Find an expression for y Part (e): Sketch the interference pattern on screen and locate maximas Part (f): One slit is covered by a film that reduces amplitude by half. Explain how the interference pattern changes. Part (g): The film is now replaced...

What happens if the screen in young's double slit experiment is replaced with a photoelectric material? Electrons should be emitted only from regions where constructive interference occurs! Doesn't that mean in this case light will depic both wave and particle nature? That is clearly not...

I was reading about the double slit experiment, and had an idea. Can anyone tell me if there is a test which negates this idea - or if someone has proposed/proven it. Say the photon goes through one slit, but a super small amount of energy (currently not possible to recognize as being...

In class we did a lab regarding the wave nature of light. We pretty much conducted Young's double slit experiment. For the lab we were supposed to establish the relationship between the distance from the slits to the viewing screen and the distance between successive maxima. Can anyone...

Hi, I'm not a scientist, but a documentary filmmaker doing research on the nature of reality. An essential disclaimer as my question might seem a bit superficial to most you guys who work in the field. I would like to know how the pilot wave theory to quantum mechanics explains the double...

I recently learned about the electron double slit experiment, and I'd like to know more about the detectors used to track which slit the electron passes through. When the detector is turn on, the electron acts like a particle, and when it's turned off, the electron acts like a wave. I'm...

Something I've wondered about the Double Slit Experiment is what happens to photons which fail to pass through either slit, and what is their behavior? Why not put some detectors on the source side of the slits during a double slit experiment to try to determine whether the photons are...

Propose this measurement: It is a well know interference measurement, but now asymmetrical. Suppose the red path is 1 m and the blue path 10 m. If you measure the time between detector 1 and 2 I expect you will find two times: 3.3 ns and 33 ns. Then you know which path the photon took...

What happen if I send electron 1 at a time and I use a detector but my detector don't show result neither record it (I setup it that way)? I presume the interference pattern is destroyed since the detector detect in which slit the electron go ? Do I am correct?

Okay it's been well established that objects with momentum exhibit wave like properties. Hence, electrons being observed forming interference patterns when scattering off of crystal lattices. Also I recently read this webpage. At the bottom it mentions performing a double slit experiment with...

I have to do an experiment for my physics class and I was thinking of doing the double slit experiment. Ideally I'd like to do the single photon version if its possible but I realize that's probably too ambitious. If I used neutral density filters to reduce the output from a laser pointer how...