Interference Definition and 999 Threads

Homework Statement Heres the question: Two towers of a radio station are 4.00 x 10^2 m apart along and east-west line. The towers act essentially as point sources, radiating in phase at a frequency of 1.00 x 10^6 Hz. Radio waves travel at 3.00 x 10^8 m/s. a) In which directions is the...

I'm trying to figure out the interaction between the stereo of a car and the wind/road noise coming from outside. I was debating with someone about the interaction and argued that the stereo sounded diminished in volume level because of destructive interference. But I honestly don't know...

Homework Statement Not too sure if my problem falls under this category. Hope I have done all formatting correctly Basically I am seeking some confirmation on my maths derivation and would like to enquire why there is discrepancies when we expressed the result in Fourier Spectrum...

Homework Statement What phase difference between two otherwise identical traveling waves, moving in the same direction along a stretched string, will result in the combined wave having an amplitude 1.3 times that of the common amplitude of the two combining waves? Express your answer in (a)...

Homework Statement Two slits are separated by 0.320 mm. A beam of 500-nm light strikes the slits, producing an interference pattern. Determine the number of maxima observed in the angular range -30 degrees < theta < 30 degrees. Homework Equations d*sin(theta) = m*(lambda) The...

Homework Statement A laser beam ( λ = 694 nm) is incident on two slits 0.100 mm apart. Approximately how far apart (in m) will the bright interference fringes be on the screen 5.00 m from the double slits? Homework Equations y=L\left( \frac{m \lambda}{d} \right) The Attempt at a...

Consider two identical optic fibers with deeply subwavelength tips. Let their tips be placed next to each other, at a distance much smaller than the wavelength. Let light of equal intensity come out of them in phase. Then, by the principle of linear superposition, at some distance much bigger...

Homework Statement http://img337.imageshack.us/img337/285/64902163.png Homework Equations \Delta x = \frac{\lambda L}{d} where delta x is the fringe separation L is the distance from screen to signal source d is the slit separation The Attempt at a Solution Okay you see I'm using...

Homework Statement A laser beam, with a wavelength of 532 nm, is directed exactly perpendicular to a screen having tow narrow slits spaced .15 mm apart. Interference fringes, including a central maximum, are observed on a screen 1.0 m away. The direction of the beam is then slowly rotated...

When i spin a benham top why do i see colors , Is this because of the dashed black lines , that i am now pulsing white light , so now the white light is out of phase and the red , green , yellow photons are interfering so i see colors , Is this is what is going on .

When the electron double slit interference pattern is destroyed during measurement detection, to determine which slit the electron passed through, the explanation is that the observation is responsible. Given that detection is done with photons that can interact and alter the path of the...

Homework Statement The transmitting antenna for a radio station is 7.00km from your house. The frequency of the electromagnetic wave broadcast is 536kHz. The station builds a 2nd transmitting antenna that broadcasts an identical em wave in phase with the 1st one. The new antenna is 8.12km from...

Hello everybody. I´m new in the forum, and i would like to ask a question. If light is an electromagnetic wave, why is it not affected by electromagnetic interference. For example, in electric engineering is used fiber optics cable when one wants to avoid EMI. Why? I'm looking for a plain...

I've been thinking a lot about conservation of energy recently, and in addition to my other thread, I have another (quite different) seeming "paradox" that I can't resolve. Suppose you have a laser shooting into a Michelson interferometer with distances such that the split beam exactly...

When a scanning electron microscope shoots electrons at the material they wish to observe , when the secondary electrons are ejected from the material and then received at the detector it seems like electron diffraction might affect the image , But it doesn't seem to , or maybe they got...

Is there a way to visually determine whether refraction or interference is the cause of the iridescent effect observed in rainbows, oil films/bubbles, insect shells/wings, cds/dvds, etc.? This question arose from when I was looking at thin films of minerals through a microscope. The slide was...

Consider the following: Two point-sources of lased light, one 600nm and the other 602nm. Each is collimated to form a beam 100 microns in diameter; thus, each forms a well-collimated laser beam. Aim each beam at each slit in a double-slit setup (each slit is 10 microns wide and 100 microns...

Why does the distance from a light source to the two slits make a difference in the interference pattern? Thanks, Jake

Interference -- Frequency Homework Statement Two loudspeakers at an outdoor rock concert are located 3.5 meters apart. You are standing 16.1 meters from one of the speakers and 19 from the other. During a sound check, the technician sends the exact same frequency to both speakers while you...

Hi Everybody! I have been wondering about wave generation from point sources, and interference. I have noticed that if several point sources are sited in a line much more than one wavelength long, a very directional interference pattern develops. The closer the sources and the longer the line...

In the double slit experiment, under observation, the electron acts like a particle rather than a wave. From my understanding this is because the photon that hits it for observational purposes adds enough energy into the system to affect the electron and make it chose one single path rather than...

Is it possible to have a 3-D interference pattern ?? if yes how can i achieve it?

hi i was wondering whether we can produce a interferece pattern with some bright fringes missing( i.e not appearing at all). If yes..how it can be achieved?:confused:

Homework Statement Speaker 1 is positioned at the origin and speaker 2 is at the position (0, 4.00) meters. They emit identical sound waves of wavelength 1.55 m, in phase. If you stand on the x-axis at (x, 0) meters, what is the smallest positive value for x for which you experience complete...

Homework Statement "One microscope slide is placed on top of another with their left edges in contact and a human hair under the right edge of the upper slide. As a result, a wedge of air exists between the slides. An interference pattern results when monochromatic light is incident on the...

Hi, For interference to take place, the light wave must retain their coherence. For scattering, when photon particles are scattered/dispersed/deflected, they should lose their phase relationship or coherence, should they be capable of interference? this may sound queer, i know interference...

its my exam question.. i am not so sure... but i put it can't because sound is a wave of vibration which it can diffract but not interence... but i don't know.. can sound wave interference? cheers

This is a question concerning the wave nature of light and the conservation of energy. Consider a prism that combines two sources of monochromatic, coherent (laser) light into one beam. The sources are adjusted so that the laser beams combine in phase resulting in constructive interference...

Below is a question (paraphrased) which I addressed to two physics lecturers on the subject of slit diffraction. The problem I have is that answer I received from them sounds so ridiculous and impossible that I find it difficult to accept. I asked the question independently to both lecturers...

Why is it that when say 2 violins are playing the same tune at the same time, there is never any destructive interference and no sound is heard?

Homework Statement Explain why wider slits at the same spacing could produce fringes at the outer edges brighter than some of the fringes nearer the centre. Homework Equations fringe spacing = (lamda x D) / slit separation width of central diffraction fringe = ( 2 x lamda x D ) /...

Homework Statement A soap film with different thicknesses at different placers has an unknown refractive index n and air on both sides. In reflected light it looks multicolored. One region looks yellow because destructive interference has removed blue ((\lambda_{vacuum}=469nm)) from the...

Interference with two speakers??! Two speakers placed 1m apart emit sound of frequency f=1000Hz in phase. A listener walks along a line that is parallel to the line joining the two speakers and 8m from their midpoint. What is the distance he has to walk from the central maximum in loudness to...

Hi In this paper, http://people.ccmr.cornell.edu/~jcdavis/publicationPDF/NaturePhys_3_865.pdf, page 2 figure 1c, there is a plot of the Fourier transformation of the local density of states for some energy E. There is a thing I don't quite understand: The LDOS is discrete, i.e. it depends on...

Hi, I'm a high school physics student and I'm having a lot of trouble with thin film interference Homework Statement A thin layer of oil (noil=1.25) is floating on water (n=1.33). How thick is the oil in the region that strongly reflects green light (λ=556nm)? Homework Equations noil/nwater...

Homework Statement Determine the maximum angle θ for which the light rays incident on the end of the the optical fiber of radius 1 mm are subject to the total internal reflection along the walls of the fiber. Assume that the fiber has an index of refraction of 1.3 and that the outside medium...

Homework Statement You are standing in front of two side by side loudspeakers playing sounds of the same frequency. Initially you hear no sound. Then one of the speakers is moved away from you. The sound intensity increases until it reaches a maximum when the speakers are 0.75 m apart. As the...

Light Question 1. Homework Statement A student enters Best Buy prepared to buy a pair of speakers. Before he does so, he conducts an experiment with them. He places the speakers 4.0 m apart and connects a signal generator to both speakers that produces a single and consistent tone...

An air wedge is formed between two glass plates separated at one edge by a very fine wire. When the wedge is illuminated from above by a 600nm light and viewed from above, 30 dark fringes are observed. Calculate the radius of the wire. Am I correct to consider only the bottom surface of the top...

Hello guys, I need desperate help. I am googling an simple experiment that can observe interference patterns ? can someone help me out please?

Homework Statement It's not a specific question. It's more of a general knowledge. As you know, an air wedge forms when two glass plates have one ends meeting each other and the other ends opening up. Here's the diagram...

I've been wondering about this for a long time. The little black box that you plug into the wall so you can power your electronic devices contains a general run-of-the-mill transformer. But if the power is completely shut off to the device: not draining any current waiting for a power button...

Homework Statement The table lists the range of wavelengths in vacuum corresponding to a given color. If one looks through a film which has a refractive index of 1.333 and thickness of 340 nm (nanometers), which color will be 100% transmitted through the film? Table (Color/Wavelength)...

Homework Statement Two antennas located at points A and B are broadcasting radio waves of frequency 96.0 MHz, perfectly in phase with each other. The two antennas are separated by a distance d=12.40m. An observer, P, is located on the x axis, a distance x=55.0m from antenna A, so that APB...

White light is shined perpendicularly onto a film of unknown thickness, with index of refraction n = 1.5. A. How thick would the film have to be for each of the following colors of light to be absorbed due to destructive interference? (15 points) Red (f = 4 * (10^14) Hz) Green...

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

Homework Statement A fine hair separates one end of two pieces of flat glass to form and air wedge.when light of wavelength 670 nm is incident normally, 25 dark bands are observed (with one at each end).How thick is the hair? Homework Equations destructive interference: 2nt =...

Homework Statement Two loudspeakers emit sound waves along the x-axis. A listener in front of both speakers hears a maximum sound intensity when speaker 2 is at the origin and speaker 1 is at x= 0.540 m. If speaker 1 is slowly moved forward, the sound intensity decreases and then...

Q. A radar antenna is located atop a high cliff on the edge of a lake operates at a wavelength of 400m. A parallel beam of electromagnetic wave is received by the antenna at E. One ray directly comes to E and other along the path ABE (after reflection at the water surface) the first minimum is...

Homework Statement A thin film with a refractive index of n=1.50 is surrounded by air. Wavelengths of light 360, 450, and 602 nm are the only visible wavelengths missing from the reflected light. What is the thickness of the film. Homework Equations The Attempt at a Solution One...