Interference Definition and 999 Threads

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?

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 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...

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...

Homework Statement light travels through air, hits a film (n=1.3) and underneath that film is glass (n=1.5). What thickness of film would result in destructive interference The lights wavelength is 500nm. Homework Equations n = c/v V = F*λ The Attempt at a Solution I...

Hey guys, I am trying desperately to figure this problem out. I have not done a problem like this ever before, and it is on our homework in a regular high school physics class. The teachers did not even teach us, this is just my attempt from research and previous knowledge. Homework...

Homework Statement Two radio frequency sources broadcast waves of the same frequency. They are placed 1.0 m apart. Let the x-axis be the line from one source to the other, and let x = 0 be at one of the sources. Nodes are observed at x = 0.24 m, x = 0.49 m, x = 0.74 m. 1) What is the...

Hi, I Want to know: High GSM RSSI mean Interference? the reason behind High RSSI ist only Interference? Thanks

Consider two loudspeakers (emitting sound waves of the same amplitude and wavelength of 15m) and an observer located in the x−y plane, with the two loudspeakers being at (2m, 0) and (−2m, 0), respectively, and the observer being at (0, 3m) initially. (i) Suppose the intensity of the combined...

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...

Hi guys, i have problem with Interference in Thin Films, i tried worked the solution not sure it is correct. Hope someone can help me check? Also there is some part on the topic i don't quite follow, 2t is the extra distance traveled inside the film, then is 2t is also rough estimate of...

Homework Statement In a double-slit experiment, the two narrow slits are spaced 0.20 mm apart. A viewing screen is put 1.2 m behind the slits. A parallel light ray is shining on the slits. (a) If the wavelength of the incoming light ray is 633 nm. What is the width of the central bright...

I'm not an engineer and I figured an EE would be able to help me on this problem. I have a garage door opener that has lost its range due to RI. I've tried everything from powering down my entire house, replacing the mother board, and the remotes and nothing works. I've worked with the...

Homework Statement A radiotelescope is positioned at a height of h=150m on a cliff overlooking the sea. A very distant galaxy emitting radiowaves, wavelength 3m, is at an angle \theta above the horizion. The radiowaves reach the telescope both directly and after reflection off the water...

Homework Statement Two loudspeakers emit 300 Hz notes. One speaker sits on the ground. The other speaker is in the back of a pickup truck. You hear eight beats per second as the truck drives away from you. What is the truck's speed? (Assume that the speed of sound is 343 m/s.) Homework...

Hi, I am doing a project on communications engineering. I've done some background reading on CDMA and spread spectrum technologies such as Direct Sequence and Frequency Hopping. My project supervisor has asked me to find out the equation for the signal to interference ratio of CDMA systems...

Homework Statement You are standing 2.5 m directly in front of one of the two loudspeakers shown in the figure. They are 3.0 m apart and both are playing a 686 Hz tone in phase. As you begin to walk directly away from the speaker, at what distances from the speaker do you hear a minimum...

Homework Statement plane plates of glass are in contact along one side and held apart by a wire 0.05mm in diameter, parallel to the edge in contact and 20cm distant. using filtered green mercury light, directed normally on the air film between plates, interference fringes are seen. calculate...

Homework Statement I have a question relating to the interference at a single frequency? Does this statement mean that the intereference has occurred between two waves which are completely in phase? I also have a question regarding if two waves which are not in phase but do not cause...

Hi all From http://en.wikipedia.org/wiki/Interference_%28wave_propagation%29: "Interference usually refers to the interaction of waves that are correlated or coherent with each other, either because they come from the same source or because they have the same or nearly the same frequency. "...

After all, the un-passed light reflects off a transparent medium with a definite index of refraction, right? HELP!

Suppose to have a beam of light reflecting over two parallalel surfaces of a material, so that the reflectd rays overlap. There is interference and the square of the amplitude is: r^2 * Eo^2 * sin (2Pi n d / L) where r is the reflection coefficient Eo is the max energy of the field n is the...

Hi I wonder if I could get help with some questions that have puzzled me related to the two split experiment and electromagnetic interference in general. I know that if you shine a laser beam through the two split experiment then inference patterns will appear, and that if the path of a...

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...

Hi, Two speakers, A and B, are located at x = +0.5 m and x = -0.5 m. A 680 Hz signal is sent to both speakers. You then walk around the origin, x = 0, in a circle of radius 5.0 m. v_sound = 340 m/s If you walk once around the complete circle, how many intensity maxima do you hear...

I've learned that when a wave is partially transmitted and partially reflected, it loses some of it's amplitude in order to conserve energy. How then, in thin film interference, can one wave produce complete destructive interference with the other if it has been partially transmitted? Wouldn't...

So I know that for constructive interference to occur, in phase waves must be separated by a distance 2 pi. What I'm confused about, though, is what if the point they interfere at is separated by a distance 2 pi, but isn't where their crests meet? Like what if one speaker is one wavelength...

Hello, could anyone help me with this question? We have a mental experiment consisting in a source S that sends two plane waves of light that propagate in one direction and collide in a photo-detector (PD). It is important to note that the propagation of each wave is in one-dimension, so that...

Homework Statement Two loudspeakers at an outdoor rock concert are located 2.4 meters apart. You are standing 17.7 meters from one of the speakers and 20.7 from the other. During a sound check, the technician sends the exact same frequency to both speakers while you listen. The technician...