Young's double slit Definition and 106 Threads

Why did Young specifically perform a double-slit experiment to demonstrate the wave nature of light, since light will diffract and interfere even through a single slit? Is there something special demonstrated by the double-slit experiment that's not demonstrated by a single-slit experiment...

Homework Statement Light from a sodium lamp (\lambda \; =\;589\;{\rm nm}) illuminates two narrow slits. The fringe spacing on a screen 150{\rm cm} behind the slits is 4.0{\rm mm} . Homework Equations I think I should use: d*(y/L) = m(λ) The Attempt at a Solution I did: d =...

Homework Statement 605-nm light passes through a pair of slits and creates an interference pattern on a screen 2.0 m behind the slits. The slits are separated by 0.120 mm and each slit is 0.040 mm wide. How many constructive interference fringes are formed on the screen? (Many of these fringes...

I am trying to prove that the two θ are equal from this picture http://en.wikipedia.org/wiki/File:Double_slit.svg How do I go about proving this?

I was thinking about this. Setup a Young's double slit experiment as follows. Single Photon Source /Pulsed Photon source -> Single Slit-> Mask with two Slits (Slit 1 and Slit 2 )-> Detection plane consisting of many single photon counters. I am assuming it's possible to detect the...

Homework Statement The interference pattern formed is given by I(θ)=4I0cos2(∏dsin(θ)/λ). For d=1×10-5m and λ=500nm plot the intensity pattern as a function of θ for small θ. How would this change if a block of material of thickness 500nm and refractive index n=1.5 were placed over one slit...

Homework Statement Is this wrong or right? PLZ.The Attempt at a Solution http://www.kentshillphysics.net/optics36.gif I have a test tomorrow buy my teacher said it's m - 1/2 Why does it say n + 1/2 everywhere. >_<

I've read in many places that if, in a Young's double slit experiment, you can determine by whatever method through which slit your photon goes through (enhancing the "particle" behavior of light), then the interference pattern dissapears. For this reason Zeilinger says that entangled photons...

I plan on trying to recreate a version of Young's double slit experiment for a science fair. All the methods I've found for it recommend using a helium-neon laser. Would a laser pointer or some other cheaper laser work? For the slits my idea is to get a glass microscope slide, paint over it then...

I am trying to recreate Young's double slit experiment and I can't figure out what he used to detect the photons. In some things I read it says he used a photographic plate. However, these are outdated and no longer available. Any ideas?

Hi hi, first post ^^ Anyway, I encountered this little problem with the derivation of Young's double slit formula. The standard derivation found on the internet and my textbook is shown here: http://schools.matter.org.uk/content/interference/formula.html When deriving, a few errors had...

Homework Statement If Young's double-slit experiment were submerged in water, how would the fringe pattern be changed? Homework Equations None...but maybe d\sin(\theta)=m\lambda The Attempt at a Solution It would not because the waves still propagate in the same manner and the...

Homework Statement Hey everyone, I am doing youngs double slit experiment to find the wavelength of a light source but i am having a lot of trouble finding the independent and dependent variables. Can people suggest what they could be? Thanks. Also, some controlled variables would be...

Homework Statement Consider a young double slit experiments where the two slits are spaced d = 0.1mm apart. If when the screen is at a distance of l=1m the first bright maximum is displaced y = 2cm from the central maximum, then find the wavelength of the light. Homework Equations...

Homework Statement so here i have shown the distances of two dark fringes ... from here ... fringe width is \frac{\lambda L}{2d} L is distance of screen ... d is distance b/w 2 fringes. but fringe width is \frac{\lambda L}{d} , right ? What mistake am i making?

Whilst skulking through Youtube videos for a deeper understanding of quantum mechanics I noticed that vidoes offering accurate, legitimate, remotely-science-based information were few and far between. The rest seemed to be videos of people saying that we, as thinking beings, create the...

Homework Statement Calculate the slit separation (d) given that: Wavelength = 650 nm (Plugged in 6.5*10^-7 m) m = 1 (plugged in 1) Distance to screen (D) = 37.5 cm (plugged in 0.375m) Distance between centre to side order (y) = 0.7 cm (pluged in 0.007m) Homework Equations We were only given...

Homework Statement In a Young's double slit-type experiment using light of 600 nm with 0.5 mm between fringes, a thin plate of glass (d = 100 micrometers, n =1.5) is placed over one of the slits. What is the lateral fringe displacement on the screen? 2. The attempt at a solution To be...

A lecturer is demonstrating two-slit interference with sound waves. Two speakers are used, 1.9 m apart. The sound frequency is 1220Hz and the speed of sound is 343 m/s. Students sit facing the speakers in a row of sear 5.4 m away. Along the row of students, what is the spacing between the...

Hi there, When performing the Young's double slit expt, we always pass the light source through a single slit first before the actual double slits. The typical textbook answer for the use of the first slit is to "produce 2 coherent light sources at the 2 slits", or "to ensure a constant phase...

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...

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

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)

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...

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?

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...

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...

I was reading about the classic Young's double slit experiment and I had a few questions regarding secondary wavelets a.k.a Huygen's wavelets. I proceed with the following questions assuming you know the experiment. The crucial point behind the explanation to the experiment is that light...

what the advantage of decreasing the distance between slits in a Young double slit experiment? i think to have the laser move closer to the screen

Homework Statement In a Young's double slit experiment, a pair of slits is encased in a rectangular block of glass (n=1.52), and glass block is surrounded by air, as shown below. The glass block is illuminated by coherent light (k = 660 nm) from a laser, as shown. The beam enters the block at...

I need to recreate this experiment. It doesn't have to be exactly the same, nor does it have to use very high tech and expensive equipment, it just has to be able to demonstrate interference patterns created by light. I cannot find any specifications on how to build this experiment, and I don't...

S1 and S2 are two coherent sources of light in a Young's two slit experiment separated by a distance 0.50mm, and O is a point equidistant from S1 and S2. O is on screen A which is 0.80m from the slits. When a thin parallel-sided piece of glass G of thickness 3.6*10^-6 m is placed near S1...

Homework Statement In a Young's double slit experiment the width of each slit is a, the distance between the centers of the slits is d, and the 10th interference maximum to the right of the central maximum is the first missing maximum. a) Find the ratio of the slit separation distance to the...

Suppose an observer is moving at some constant velocity(<< c) and observing the young's double slit experiment. What changes will it observe compared to an observer at rest? This is what i could make out : 1) The wavelength of incoming light will change (doppler effect) 2) By the intuition...

Young's double slit experiment produces regular intervals of bright fringes and dark fringes. The bright fringes happen when the 2 sources of wave are in phase and superimpose while the dark fringes are produced when the 2 waves are in antiphase and vectorially cancel each other out. However...

1. The photograph shows the interference pattern produced when monochromatic light falls on a pair of slits. I cannot post links yet but the photo is of a typical fringe pattern produced by coherent light waves from a double slit. Mark with an X on the photograph the fringe or fringes...

Homework Statement http://img141.imageshack.us/img141/1395/40941671kx8.jpg http://img141.imageshack.us/img141/982/82443157pt9.jpg Homework Equations http://img85.imageshack.us/img85/4523/60192566ie7.jpg The Attempt at a Solution I'm not sure where to start with this one. I've...

I am stuck on a question regarding Young's Double Slit Experiment. The two beams in Young's double slit experiment must (a) be parallel (b) have equal intensity (c) come from the same source (d) traverse equal distancesHere are my reasons for my answers. I may be misinterpreting certain parts...

can u suggest a good site for studying young's double slit experiment involving interference of light coming from two coherent sources online?

Q.Suppose that the the light rays in young's Double Slit experiment fall at an angle \theta=\sin^{-1}(\frac{\lambda}{2d}) .Then prove that the the Point P which is the symmetric point on screen between two slits is the centre of central minimum Necessary Formulaes for minima the waves...

i was going through the standard proof of Young's experiment using electric field concept .what the proof did is took two source S_{1} and S_{2} in the same line(asuuming such points do exist) and took a point P in the same plane as those points and found out the field at the point . 1.Was this...

Hi I don't know whether this is a homework-type question or not, so I am posting it here. In young's double slit experiment the interference pattern is found to have an intensity ratio between bright and dark fringes as 9. What does this imply: (Below are the options provided in the book...

I am doing a presentation for my high school physics class on light. I want to show the wave-particle duality of light, but first I want to show each separately. So I want to introduce Young's Double Slit Experiment to show the wave nature of light. The problem is... I apparently don't know...

Hi, I would like to know what would happen if we altered one of the slits by making it into a very very long tunnel (an optical cable that would run for a significant distance, but would come out on the other side of the screen almost in the same spot of its beginning). Would this destroy...

I've been working on my Physics work when I scanned across a section and noticed something that bothered me. The equation: d sin (thetha) = m (wavelength). d is the separation and m is an interger. However, it said to find the bright fringes of a double slit (Young's Double Slit...

Hello all, I have a problem that requires some knowledge about Young's double slit experiment. The question is as follows: Imagine performing Young's experiment with one slit wider than the other so that the intensity passing the wider slit is four times as great as that passing the narrower...