Double slit Definition and 825 Threads

Is the formula for single slit diffraction Dsin\theta = m\lambda identical to the double slit diffraction besides m being minima rather than maxima? More specifically will m + 1/2 tell me the angles between maxima?

I have some questions regarding Young's double slit experiment. 1.The first concerns the no. of possible fringes that will be formed. Sample question is as: Slit Separation = 1mm and wavelength of light is 5250 A. No. of illuminated fringes=? The basic problem is that I don't understand...

Homework Statement A extent ray of light with wavelength \lambda _0=632.8 nm incide over a screen containing 2 horizontal parallel slits very thin and separated by a distance of 0.2 mm. We observe an interferance over a screen at 1.00 meter away from the screen containing the horizontal...

If photon's cannot couple with other photons , then when we shoot photons through a double slit and we get an interference pattern , How are the photons interfering with the other photons , and if there is no such thing as half photon like the photon is either absorbed or it is not ...

So let's say for example there is a slide with two slits on it infront of a screen. A beam of electrons is aimed at it. A) What would happen to the size of the fringes on the screen if I decreased the spacing between the slits B) What would happen to the fringes if I moved the screen...

In the standard double slit experiment, what time period is measured between the emission (t=0) and detection (t=T) of a single photon? I ask because clearly the photon does not take a single, well-defined path, as it would if it were a classical particle. Suppose that I set up an experiment...

What effect does the distance between the two slits have on the intensity of the maxima?

I have a problem on Young's double slits which says that the central bright fringe shifts 4.5? fringes after a piece of plastic is placed in front one of the slits. My question is: Why is the central bright fringe shifted for 4.5 fringes? Shouldn't it be 0.5 fringe instead since maximum...

can it be possible that using young's double slit experiment or by any metod on converging and magnifying the intensity of microwaves it can give same effect as LASER

i think I have an alternative explanation to the double slit.We can assume that the slit surface is not completely smooth,thus a photon may enter these gaps thus allowing for interference in the case of single photon emitter

In class we have been deriving the Fraunhofer interference pattern for a double slit experiment. I now have a question of having to derive it if one of the slits is covered with an absorbing material. I have got the equation out but I am missing a constant K... Homework Statement We have two...

In double slit experiment of electron, we see an interference pattern when we don’t know through which slit electron has passed and we don’t see an interference pattern when we know through which slit electron has passed. Now, to identify the slit through which electron has passed, we use...

Homework Statement Two narrow slits are 0.4 mm apart. The dark fringe of order 5 is 1.2 degrees from the central bright fringe. What is the wavelength of the light in nm? Homework Equations dsin(theta) = (m +1/2)lambda where d = distance between silts m=order lambda = wavelength...

Hi Everyone, I'm trying to fill in some gaps in my understanding of the double slit experiment. I think I'm most confused about the detectors. Before I start asking questions, I'd like to spell out what I think I understand with a summary: --- Summary of DSE --- Equipment 1. source...

if the double slit particle experiment is observed by an animal and not by any human for eg. chimpanzee, through which slit the particle has passed would it collapse the wave function and form particle pattern. The particle are only observed by the chimapanzee, so it can know which slit the...

Mechanically speaking, where is the photon emitter aimed when there are 2 slits? If the experimenter was using an accurate emitter, wouldn't he/she expect the photons to hit only where it was aimed, e.g. either one slit or neither slit? Is it that the emitter oscillates, so it can aim at each of...

I have been trying to understand the result of the double slit electron experiment I’m still not clear abt the result of the experiment. I have seen the Dr. Quantumm - double slit experiment video(). Its very simple explained. it says when an measuring device is placed to look through...

Find the slit separation of a double slit arrangement that will produce interference fringes 11.5 mrad apart on a distant screen with light of wavelength 471.0 nm. tan(theta) = y/D asin(theta) = p * wavelength I know that I'm trying to solve for a, and that asin(theta) = 11.5, but I feel like...

It was a good while ago since I heard about this particular experiment, but I remember vaguely reading about how in one instance they recorded the observations, but then deleted the data before anyone could look at it, and in that instance the wave was still produced. Thus showing that it really...

Can we do double slit experiment using ,let's say phonons.

hi maybe I'm asking a stupid question, I'm a layman, and i didn't succeed to google out the answer. while performing single photon double slit experiment, why the photons don't just get absorbed in the separation between the slits, like they do in the screen behind. and consequently...

Homework Statement A grating with 349 lines/mm is illuminated with light of wavelength 412 nm What is the angular separation between the two lines formed in order m=2? Homework Equations \vartheta = m\lambda/d The Attempt at a Solution I did not know how to use this equation...

Delayed choice in half silvered mirror or double slit For now, I am focussing only on the half silvered mirror: there are two paths/arms that are created. My question is: 1. If a detector/obstruction is placed on either of the two paths after the photon has passed but before its hit...

Homework Statement 1. What will happen if we use white light as the source of young's double slit experiment? 2. If the experiment is done in water, what will the effect to the yn? yn is the distance of nth fringe from center fringe. Homework Equations d sin θ = nλ d y/D = nλ The...

i have posted a video on youtube,where i did the double slit experiment,firstly with a shallow slit,then with a slit approx 35 times thicker,then did the experiment without lens on laser,i would like to have a chat about what it all shows,and what it says to you (any one)

When a photon encounters a beam splitter, say a half-silvered mirror, there is a 50-50 chance it will be reflected or passed (tunneling). Does being reflected/passed constitute a QM "measurement"? Thanks in advance.

I'm reading the double slit experiment (Cohen-Tannoudji chapter 1 - complement D) and it is said: "We are going to consider Young's double slit experiment again to demonstrate how complementary and uncertainty relations are intimately related. Assume that the plate P, in which the slits are...

Hi all, I'm not trained in physics beyond high school but have a healthy interest and understand a little quantum physics and special (still grappling with general!) relativity. Here's a quick question on a pop.science book I'm reading at the moment. The book is by Marcus Chown, it's called...

Homework Statement A parallel beam of mono-chromatic light (500nm) is incident on 2 long narrow slits: slit width is 0.1mm and the distance between slit centres is 0.3mm. a) How many bright fringes cover the central diffraction maximum? Homework Equations Condition for constructive...

Does the distance from the photon/electron gun to the slit matter at all? Or even the distance from the slit to the photographic plate?

Homework Statement Light of two wavelenghts L1 and L2 (L1,L2 = lambda)creates interference fringes in the Young's double slit experiment. To calculate the least distance from the central maximum where the bright fringes for both L1 and L2 coincide. Given: the distance 'd' between the two...

Lets say some aliens scaled up the two slit experiment to an enormous size. It is so large that shooting 100kg masses of carbon through the slits creates a diffraction pattern. The aliens then decide to replace the carbon with some captive humans and shoot them through the slits to see what...

I was wondering where could I get a slit for the Double Slit Exeriment that I am trying to do.Thanks

Can someone summarise what is the currently accepted interpretation of how measurement affects the interference pattern in a double slit experiment? (Answers which say things like 'the electron knows if it is being observed' are not acceptable - :-) ) To quote from the PF rules, I'm looking for...

I was browsing about the double slit experiment and found the following tidbit on Wiki: (emphasis mine) I knew that electrons could interfere with themselves - I understand how an electron can act like a wave. Even an atom I can understand. But a molecule? This isn't merely suggesting...

When measuring the fringe width of a superposition pattern from a monochromatic source - I am using a laser. What problems/inaccuracies could I have when measuring it?

What happens to a light wave when it is reflected off the surface of a material with a higher index of refraction? a. It reflects with its phase shifted by π. b. It reflects with its phase shifted by π/2. c. The phase shift is proportional to the angle of reflection. d. It...

Homework Statement For light from a discharge lamp, the first-order bright fringe is observed at a perpendicular distance of 2.35cm from the mid-point of the slits, when the slit-to-screen distance is 1.2m and the slit separation is 0.03mm. What is the wavelengh of the light from the lamp...

I could not find any explanation or illustration where it is shown where do they actually aim electron gun (or something) in the version of the experiment where they shoot electrons one-by-one. I suppose this is how original setup looks like: ====================screen== \ / \ /...

Homework Statement A radar tower sends out a signal of wavelength lambda. It is x meters tall, and it stands on the edge of the ocean. A weather balloon is released from a boat that is a distance d out to sea. The balloon floats up to an altitude h. In this problem, assume that the boat and...

Hi everyone, I have a question concerning the double slit experiment that I would like clarified. According to a book I am reading if the electrons passing through slit A are of spin up and the electrons passing through B are of spin down then there will be no interference pattern (just the...

Has this type of experiment ever been performed? Firing electrons one at a time we can easily get the which-path information and see if interference dissapears or not. What actually happens? Also, if we do the double slit experiment with a usual laser but in a smoked environment (in order to...

Hi, I have a question about the famous double slit experiment. They say that if an observer like a camera or a person is watching the experiment then it collapses the wave function and two marks appear instead of an interference pattern. Does anyone know what what happen if a totally...

I have a question about Young's Light-double slit experiment, is there a minimum ratio between the intensity of the light and the size of the slit or the distance in between the slits to alter the results? For example, if a wall has two open doors into the same empty, standard room and a photon...

I have to recreate Thomas Young's Double slit experiment and take pictures of the interference patters for a research paper. My teacher has a powerful red laser at school that I can use, though i know that the interference pattern changes with the changing frequencies. I was wondering if a 5 mw...

I've been wondering about the implications of this experiment and have a couple of questions about variations that I'm wondering if anyone has done. (I did not find any examples of these variations elsewhere). 1) In this variation, you have the photon pass through the slits twice. First...

Hi all I have a doubt on this The experiment per se does not say anything wrt to the size of the slit right? Now my question here is, if i actually reduce the size of the slit to such a size that only one atom of a particular gas(say helium) can pass through this Now let us say i...

please can you lookm at my video on youtube and give comment,if you think I am mad say so,if you think it looks right please say so (it isn't a spam video just what i think is missing from the experiment that's all) http://www.youtube.com/watch?v=hG_vNk-TJOs&feature=channel_page

Hi, I'm encountering problems in my tests about young's double slit experiment and in many of those I'm finding the source executing simple harmonic motion (whose equation is given ) and we are asked to calculate the equation of motion of central bright fringe,max no. of fringes that can be...

double slit experiment, question on when the path is "determined" Hi all, question here from a non-scientist. Let's say I set up a double-slit experiment, with a detector at one or the other slit. I get it working, so that when I am able to determine the particle path, the interference...