Double slit Definition and 825 Threads

All these videos and articles about the Double Slit Experiment say that if we "look" where the single photons go, they act like particles and if we don't "look" they act like waves, creating the interference pattern... BUT What does it mean to "look"? We're not using our eyes or any camera...

I've recently been doing some learning about the double slit experiment and a bit about how, qualitatively, quantum electro dynamics works. Something that I wondered about for a long time was how momentum could be conserved in these systems when we assume that a particle could land in any number...

In Young's double slit formula, the equation is d sin \theta = m \lambda Which means that sin \theta = m \lambda / d But, what if d < \lamda so the sine value becomes greater than 1? Will there be any interference?

Homework Statement I am having troubles trying to figure out systematic and random errors when conducting Young's double slit experiment. Homework Equations NA The Attempt at a Solution I have found one error which could be correct, it is the fact that the laser was not at right angles with...

Homework Statement A double-slit experiment uses a helium-neon laser with a wavelength of 633 nm and a slit separation of 12mm. When a thin sheet of glass is placed in front of one of the slits, the interference pattern shifts by 5 fringes. When the experiment is repeated under water, the shift...

Homework Statement Upon using Thomas young’s double slit experiment to obtain measurements, the following data were obtain. Use these data to determine the wavelength of light being used to create the interference pattern. Do this in three different ways (6) • the angle to the eighth maximum...

Consider the double slit experiment; if we position a detector at, say, the left slit, will a single particle, say, an electron, when fired at the slits, always be detected at the left slit, or will it be detected at the left slit 50% of the time? (so that it is 50% of the time at the right slit)

I am new here so I will start with a warming up question :) My question is very trivial here we go: In double slit experiment when shooting one photon at a time, we get interference pattern. Then when we put a sensor at one of the slits the interference pattern disappears because we now know...

Say we have a particle, like an electron in a double slit experiment. And say that we have a measuring apparatus to detect it right after its fired out of the electron gun. And after that it goes through the double slit and hits the detector plate. Would we see an interference pattern? If the...

Has anyone performed the double slit experiment in three dimensions? By this I mean, having double slits and a detection screen on three sides? This would imply there are 6 slits and 3 detection screens. What would we observe? Would we see the electron exhibiting wave like behavior (ie...

How does MWI deal with the destruction of interference in the double slit experiment when a detector is placed at the slits? Since the wave function never collapses, and the universe doesn't actually split in MWI, how does the interference go away? Does the measuring device at the slits reshape...

I would like to ask this question. In the double slit experiment on wave particle duality of photon, we know that the wave function collapses and the photon behave like a particle whenever we peek. Has anyone ever placed a second double slit behind the detector to see whether a particle regain...

Homework Statement A double-spit experiment is performed with light of wavelength 600 nm. A wide viewing screen is 2m behind the grating. What is the distance between the two m=2 bright fringes on the screen? The slit separation given is 0.1 mm. Homework Equations Given the wavelength and...

Does it matter what the slits are made of? Do different kinds of matter make difference interference patterns on the wall? Also I know, part of that cause waves in the water is the surface tension. Does some kind of surface tension come into play with the double slit experiment waves of...

I am not a physicist but I am interested in the double slit experiment and would like a definitive answer, from a physicist, to my question as follows:. If the which path is just detected by a detector, without it flashing and bleeping at the same time, and without the detections being recorded...

Homework Statement Light of wavelength 600 nm passes through two slits separated by 0.20 mm and is observed on a screen 1.0 m behind the slits. The location of the central maximum is marked on the screen and labeled y=0. (I only need help on the last 2 parts, but I will list all of them in...

Homework Statement Laser light of wavelength 517 nm illuminates two identical slits, producing an interference pattern on a screen 87.5 cm from the slits. The bright bands are 1.15 cm apart, and the third bright bands on either side of the central maximum are missing in the pattern. a.) Find...

Consider diffraction in a ripple tank from two narrow slits. Answer true (T) or false (F) for each of the following statements. E.g., if the first statement is true and the rest false, enter TFFF. You have 6 tries. If the frequency of the wave source is halved, then the angle between the...

I have a question on a particular version of the double slit experiment (I know there are many). I am not sure I understood it correctly, so I am going to explain it in a very basic manner and in my own words. You tell me if my explanation is correct or not, and then I have another question...

Hey there! This thread started off as a question regarding the impact of blindness on the wave function collapse, ended up thinking of an alteration to the double slit experiment that I think could yield some interesting results. So! Say the double slit experiment is run with measuring devices...

Hello, first post. I recently became interested in quantum physics and its mysteries. To my understanding, In the double slit experiment, the photon or electron will scatter and behave like a wave when both slits are open and neither slit is measured. Over time their cumulative scattering mimics...

i've seen the double slit experiment and the delayed choice . my mind rejected the conclusion, but the experiment setting and configuration of delayed choice is rational and holds water so i accepted the experiment outcome even if it means the world isn't real. i had to give that intro that...

In the literature we are told that the double slit experiment works but are given no description of the experiment apparatus How big are the slits, how far apart are they, or does it matter Would using 3 slits make a difference, would photon go through A and B, or through B and C, or all 3. When...

When was it first experimentally seen that particle detectors can change the interference pattern effect expected in a double slit experiment? Is it still theoretical? What were some double slit experiments in the early era of quantum mechanics? How were they handled?

Has someone attempted to criss-cross multiple double slit experiment paths? The purpose would be to mix paths of observed and free particles. I want to know if clumps and fringes appear everywhere or we would get something new.

Tom Campbell posted a series of videos in youtube where he proposes a few variation of double slit and DCQE experiments that might support his theories. He claims that would be possible to predict a future atom decay or a beam splitter behavior that way. I am very interested about experiments...

When it's desired to detect an electron coming through one of the slits in the mask of the double slit experiment, how exactly is the detection done without blocking the electron from reaching the background screen? In another thread it's mentioned that a semiconductor detector is placed behind...

Homework Statement 2. Homework Equations I = Imax cos^2 ((2pi/lambda)dsin(theta)) .81Imax = Imax cos^2 ((2pi/lambda)dsin(theta))[/B] To shorten up my work I divided out the Imax 3. The Attempt at a Solution Not sure where I am going wrong. Is the 2.65 deg not the theta I am suppose to...

Homework Statement Here i am asked to find the phase difference. Homework EquationsThe Attempt at a Solution I know that usually the equation is mλ=asinΘ

I've wondered about this for sometime, say you rotate one of the polarizers (one of the two covering each slit) slowly from perpendicular to parallel, would the interference pattern slowly come into view?

I have 2 questions 1. I'm telling a friend that in the double slit experiment.. the electron has no trajectories between the emission and detection. But she commented the initial emission has trajectory. Is this correct? What is the term for this situation of the initial emission of the...

In our textbook, it says that the intensity of a double slit interference pattern stays the same if the slit width is negligible. I do not understand this concept. As far as I am concerned, intensity should decrease as the circle of diffraction increase, as intensity is work per area, and the...

This is a proposed idea. Using the "Delayed choice" version of the double slit experiment, can you devise a way to send Information (in this case the winning lotto numbers) Into the past? I imagine that one could convert the winning numbers into binary, assigning a 1 for wave experiments, and 0...

I'm currently designing an experiment on Double slits for a high school science fair, but I'm not sure whether it's plausible or not. I'll be spending some of my savings for this, that's why I would like to hear some feedback from more-knowledgeable people first. In this experiment, I am trying...

My question about the double slit experiment is this: why is it that nobody suspects that the detectors used to detect particles as they pass through the slits in the double slit experiment aren't causing some interference with the experiment which makes it seem as though they are acting like...

Hello, in the double slit experiment, what will be the result if two persons are checking the experiment using the same equipment to perform the experiment, but one person will take note from which slit is passing the electron while the other is not checking. Will they see the same thing...

Say, you're running an electron double-slit experiment, firing one electron at a time, only that half of the screen where you record the interference pattern is moved further away from the slits. How would that affect the interference pattern? Would the electrons still go in the same ratio 50/50...

Homework Statement Two antennas located at points A and B are broadcasting radio waves of frequency 98.0 MHz, perfectly in phase with each other. The two antennas are separated by a distance d= 6.20 m. An observer, P, is located on the x axis, a distance x= 60.0 m from antenna A, so that APB...

Is there an online simulator which can be used to visualize the double slit interference? I know this can be done via equations, but as I am working with my kids on this, I prefer visual and want to add variations of different polarizers before each slit. If no simulator available, any...

I would like to show you my own opinion about DSE. I might be silly but I suspect data filtering issue. Let's suppose we have a detector DA for slit A, DB for slit B and a interference detector D0. If we consider the photon a wave pulse it means it will go either through a slit or through both...

How are the double slits constructed? If you use electrons or photons then they should interact with that material or what?

Homework Statement Hi, I want to apologize for any grammar errors in advance since english is not my first language. But i hope it is good enough such that the question is clear: I want to calculate the velocity of a Helium-atom after it scattered on a double slit. The following information are...

What is detected on the second screen if after a photon went through the slits but before it hits the second screen, the screen with slits is removed (or both slits are closed)?

I heard about the following experiment and I'd like to know if it really works this way: Double slit experiment with a detector that gathers information about which slit every particle goes through and stores it in an unobserved black box. The screen is an unobserved photo film that needs to be...

Is one particle detected on the detection screen for each particle shot in a double slit experiment? Or do some particles fail to be detected because they hit the barrier in between the two slits? In other words, is there an exact one to one correspondence of particles shot to particles...

Homework Statement monochromatic light of 625 nm of wavelength falls normal to the optical bar. Total number of light lines that appear behind the bar is 11. What is the constant of the difraction bar? Homework Equations 3. The Attempt at a Solution [/B] I tried ##dsinx=ms## where ##s## is the...

Homework Statement A double slit apparatus is held 1.2 m from a screen. (a) When red light (λ = 600 nm) is sent through the double slit, the interference pattern on the screen shows a distance of 12.5 cm between the first and tenth dark fringes. What is the separation of the slits? (b) What...

Hello guys, I have few questions about the well-known quantum tunneling. I'll start off with the animation from wikipedia So question #1 why doesn't the barrier collapse the wave function, is that even possible? What's the difference between the barrier and the measurement screen in double...

I know this question has been asked before but I have only found threads for it at an undergraduate's level of understanding and I am just finishing ninth grade. How does the double slit experiment prove superposition? What led me to ask this question, was that, since when you close one slit the...

In the third book of Feymann's Lectures on Physics(section 1-8) he describes how "the Uncertainty Principle protects Quantum Mechanics." The experimental situation is a modified double slit experiment where the two slits are put on rollers in an attempt to detect which slit an electron passes...