Interference Definition and 999 Threads

Homework Statement A laser is shone through a set of slits and onto a screen. I have a Δy vs. L graph plotted, where Δy is the spacing between successive nodes, and L is the distance from the slits to the screen. I'm supposed to find the spacing between the center of the slits. The value of λ...

Homework Statement A mask with 2 slits is illuminated by a light of 589nm wavelength. Slits each have a 0.1mm width separated (centre to centre) by 3.0mm. Calculate the distance between adjacent bright fringes on the screen if a screen is placed 5.0m away from the slits. Homework...

Homework Statement Ramon has a coherent light source with wavelength 554 nm. He wishes to send light through a double slit with slit separation of 1.5 mm to a screen 90 cm away. What is the minimum width of the screen if Ramon wants to display five interference maxima? Homework...

Homework Statement A sheet of glass is coated with a 505nm thick layer of oil (n = 1.42). For what visible wavelengths of light do the reflected waves interfere constructively/destructively? Homework Equations For constructive interference lamba=2nd/m For destructive...

Homework Statement There are three slits in a screen, with one aligned with the source at z=0, one a distance a above 0, and one a distance b below 0. Another screen is at a distance d >> a,b from the first. What is the periodicity of fringes on the screen? Homework Equations \Delta \phi =...

I've been thinking about the many-worlds interpretation and how one might test it experimentally. I'm wondering if it might be possible to observe interference between macroscopic systems in different "worlds". We start with an isolated quantum system in superposition, and we let it interact...

hello again folks, this is the last problem that I haven't gotten in this week's homework. see attached image. Homework Statement Two rectangular pieces of glass (see attached image, I painstakingly made it with a very fussy/crash-ey program) are laid on top of one another on a plane surface...

The GPS (Global Positioning System) satellites are approximately 5.18 m across and transmit two low-power signals, one of which is at 1575.42 MHz (in the UHF band). In a series of laboratory tests on the satellite, you put two 1575.42 MHz UHF transmitters at opposite ends of the satellite. These...

Homework Statement Monochromatic light of wavelength \lambda = 400 nm enters at A. It impinges on a ‘half-silvered mirror’ B, which directs some of the light to mirror C, while passing the rest to mirror D. Some of the reflected light from mirror C passes back through the half-silvered mirror...

1. With the later on given info, is it possible to through geometry calculate the wave length of a HeNe Laser? 2. Homework Equations and facts A Helium Neon laser emitts light through a double slit and towards a screen where a central image and the first dimmer bands can be seen. The...

Homework Statement A very thin oil film(n=1.25) floats on water(n=1.33). What is the thinnest film that produces a strong reflection for visible light with a wavelength of 700nm? Homework Equations \lambda=(2nd)/(m-0.5) d=(m-0.5)*(\lambda/2n) thinnest film has m=1 The Attempt at a...

Homework Statement Two coherent sources of radio waves, A and B, are 5.00 m apart. Each source emits waves with wavelength 6.00 m. Consider points only along the line connecting the two sources. (a) At what distance from source A is there constructive interference between points A and B...

Homework Statement "If the distance between the centers of adjacent slits in the five-slit mask is 125[lambda], determine the angle (measured relative to the normal to the screen) to the minimum closest to the center of the screen." Homework Equations So, I have a question about the...

Homework Statement A photomultiplier (PMT) is arranged to detect the photons from a double-slit experiment. It is placed at a point P in the detection plane and makes an angle \theta with the horizontal of one of the slits. Assume that the two slits have different widths and that the widths...

Homework Statement Light waves of which wavelength will destructively interfere due to the thickness of the bubble film? The bubble film thickness is 165 nm, with an index of refraction of n = 1.3. a= 430 nm b= 650 nm c= 860 nm d= 285 nm (different wavelengths) Homework Equations...

Homework Statement An aircraft causes a horizontal layer of charged particles to be formed in the atmosphere. Radio waves are relected without phase from this layer. Radio waves of frequency 8.00 x 10^2 kHz are received at a location 12 km from the transmitter. What is the minimum height of...

Homework Statement FM station KCOM ("All commercials, all the time") transmit simultaneously, at a frequency of 97.1 MHz, from two broadcast towers placed precisely 32.44 m apart along a north-south line. (a) What is the wavelength of KCOM's transmissions? Homework Equations...

QUESTION: Astronomers observed the interference between a radio wave arriving at their antenna directly from the Sun, and on a path involving reflection from the surface of the sea. (http://i62.photobucket.com/albums/h101/kaikibana/problem1.jpg) Assume that the radio waves have a frequency...

Homework Statement Two loud speakers emit sound waves of the same wavelength.When a microphone is moved between them quiet places are observed 20cm apart.What is the wavelength of the sound waves? Homework Equations The Attempt at a Solution

Homework Statement green light of wavelength 5000 A is incident normally on a grating, and the 2nd order image is diffracted 32 degrees from the normal. how many lines/cm are marked on the grating A=10^-10 n= 2 degree= 32 d=? wavelength- 5000 A the answer to...

If two lasers are pointed emitting end to emitting end in a vacuum (for lowest divergence), and emit 2 beams of light 180 out of phase, could both beams destructively interfere completely (no light coming from either emitting end after the beams converge)? If the experiment was done under...

ok so i know why this happens but I am just not sure how to see how thick the film would be, I am not sure if your supposed to use the equation dsin(-)=wavelength someone help please thanks! You are outside in the Sun blowing bubbles. As you raise the round wand to blow bubbles, you notice an...

In Brian Greene's book 'The Fabric of the Cosmos' he introduces an experiment called the "delayed-choice quantum eraser". This was really a magnificent experiment at first sight but pretty unclear when I was done reading the results. The experiment basically goes like this: In each path that...

Homework Statement A transparent oil with an index of refraction of 1.25 spills on the surface of the water (n=1.33), producing a maximum of reflection with incident orange light (\lambda = 602nm in air.) Determine the lowest possible thickness (in nm) of the oil slick.Homework Equations...

I don't have a particular homework inquiry to ask, just some questions I have about thin-film interference and its related equations. I was told by my instructor to learn these concepts on my own and I am just having a few problems I want to clarify. 1) Equations related to thin-film...

Say we have two electrons in a spin entangled state about the z-axis |01> + |10>. One electron travels off to our left, the other to our right. The right electron passes through an inhomogeneous magnetic field with gradient solely in the z direction (Stern-Gerlach type), and subsequently...

Homework Statement Find out the condition for two-plane-wave interference. The two plane waves are given as \vec{E}_1 = E_0\vec{A}\exp(ikz - i\omega t) + c.c. \vec{E}_2 = E_0\vec{B}\exp(ikz - i\omega t + i\phi) + c.c. where \vec{A} and \vec{B} are complex. All other...

Homework Statement Consider a plane wave (of wavelength λ) incident on a wall at an angle Φ = 30. There are two slits in the wall separated by a distance d=10λ. Each slit has width a<<λ. Rays emerging from the slits propagate to a distant screen where an interference/diffraction pattern may be...

Lets say I make 2-slit interf. experiment with slow (low enegry) electrons. I make their path as long as possible so they have time to fall in the Earth's gravitational field while they are flying. So electrons are attracted to the Earth, hence the Earth is attracted to the electron beam...

How do you determine whether two rays of light will constructively or destructively interfere? Is it possible neither can occur? I'm just trying to figure it out for the basic case where they are separated by 'd' in the diffraction grating and later meet up at a point. My TA said you...

http://img504.imageshack.us/img504/3341/img186je6.th.jpg Above is an image scanned in from my textbook of an interefernce pattern from two slits. Am I correct in thinking that the distance between the maxima within the main envelope is found via λ = ws/D , where w = this distance...

In Young's double slit experiment, how come the interefernece pattern produced does not take into account single slit diffraction? Thanks

From: http://www.bottomlayer.com/bottom/basic_delayed_choice.htm I refer to the above picture of the double slit experiment. I wonder what you would get if you added a third detector 5C in between 5R and 5L? Presumably you would get zero detects, because when you check the which-path, the...

Homework Statement What is the minimum number of lines per centimeter that a grating must have if there is to be no second-order spectrum for any visible wavelength? (Let visible region extend from 400 nm to 570 nm.) Hint: Draw a diagram showing the relative positions of the rays corresponding...

Homework Statement Two pieces of optically flat glass (n=1.5) touch at one edge and are separated by a thin stretched fibre at the opposite edge. Light of wavelength 500nm is shone from above and 100 dark fringes are counted. The air between the glass is now replaced by water (n=1.33). How many...

My interest is in reducing RF interference in electric guitars in RF-noisy environments by shielding the body cavities with sheet metal. Would copper sheeting block RF? Or would it need to be some ferric material? I imagine aluminum alloy would be RF-transparent - is that true? Ideally, I...

Homework Statement Light of wavelength 525 nm is used to illuminate normally two glass plates 26 cm in length that touch at one end and are separated at the other end by a wire of radius 0.03 mm. How many bright fringes appear along the total length of the plates? Homework Equations...

A certain crystal has a planar spacing of .25nm. What energies are necessary to observe up to three interference (diffraction) maxima for a)electrons and b)neutrons?

Homework Statement Two identical loudspeakers are located at points A and B, 2.00 m apart. The loudspeakers are driven by the same amplifier and produce sound waves with a frequency of 784 Hz. Take the speed of sound in air to be 344 m/s . A small microphone is moved out from point B along a...

Homework Statement Two loudspeakers are placed a distance of 5m above and below one another and driven by the same source. A detector is positioned a perpendicular distance of 12m from the two speakers and a vertical height 3.2m from the lower speaker. This results in constructive interference...

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...

Homework Statement somebody help me, i have a homework question: obtaining the formula of calculating the intensity of n slits interfenrece. Homework Equations the only source is the formula to calculate the intensity of double split interference: I/Io = (E/Eo)^2, and I = 4Io(cos(pie...

If the amplitude of three intersecting waves is given by y(r,t) = \frac{A}{r}e^{i(kr-wt)}[1-2cos(kdsin\theta)] how can I then find the intensity at r = 200 m as a function of \theta? I know that intensity is the square of the amplitude. Should I simply square y(r,t)? If I do, I get I as...

Homework Statement Three slits of width a and d (separation of adjacent slits). d << the distance to the screen. Show that the intensity we observe is I (\vartheta) = I_{1} \left[1 + 2 cos \left(\frac{2 \pi d sin\vartheta}{\lambda} ) \right] ^{2} 2. The attempt at a solution...

Homework Statement Monochromatic light of wavelength 656 nm is normally incident on a vertical plate with two slits at positions +-d/2 where d=.25mm, the resultant interference pattern is observed on a screen at distance D= 3.4m away, let y denote vertical position on the screen with y=0 at the...

Homework Statement A person driving at v = 15 m/s crosses the line connecting two radio transmitters at right angles, as shown in the figure (d1 = 300 m and d2 = 100 m). The transmitters emit identical signals in phase with each other, which the driver receives on the car radio. When the car...

I am looking for someone that can tell me how to reproduce this experiment sen on nova last week A rectangular black box was used with a low power ? 1mw red laser . A long box was used there were 2 vertical openings left and right of the laser path to the photon detector. There was no direct...

Homework Statement I did part A & B and got the right answer. Question C is "Is the separation the same for all maxima?" Homework Equations \sin \theta = m\lambda /d The Attempt at a Solution In the homework problem, sin theta can be computed with y/D, where is the separation of...

hallo all, I was wondering if you were able to help me with the following: I am wondering about how body armor works exactly and have checked some sites, but still strugle with some questions. As for know I have the following: when a bullet hits a body, then you have injuries caused by the...