Interference Definition and 999 Threads

Hi, I have an experiment set up to get two beam interference fringes. I would like to know how I could measure the actual amplitude of the irradiance from the experiment. I have with me a power meter and a CMOS camera. How can I go about this? Thank you

Hello! I have done this experiment and managed to find this data: http://puu.sh/bO8TJ/ac3520ec8b.png Am I right for saying that the position that reaches the value of 5 amps are the central bright and the position 220-ish as the 1st bright order and the position 260-ish as the 2nd bright...

Homework Statement Write down the intensity equation for a two-slit interference pattern with diffraction effects included. Indicate which part originates from double-slit interference and which part from single-slit diffraction. What happens when the angle = 0Homework Equations...

If I have two waves traveling in opposite directions as shown in the attached image... After 30 seconds what will the waveform look like? Im having real trouble conceptually understanding this! Please help... Many thanks in advance

Hi :-) I'm currently learning about wave interference and came across two phrases I can't seem to find the meaning of; first order minimum and second order minimum. What do they mean an how are they used? I presume they are for the order of destructive interference or something?

Homework Statement Two sources, S1 and S2, send our circular waves that are in phase and of the same frequency. They have the same wavelength (0,5m) and the same amplitude. Will there be a maxima og a minima at the given points: a) S1P = 5.00 m og S2P = 6.50 m? b) S1P = 5.00 m og S2P =...

Imagine a beam of light diverging from a source and being incident on a detector. Now imagine a similar set up but with one main difference. The difference is that on its journey to the detector the beam passes through a second beam such that in the overlap region the two beams interfere. Having...

I was thinking about which two musical notes, when played together, maximize the absolute value of the area under the curve of the resulting wave within its period while keeping the amplitude to a minimum (ideally the amplitude of the original two sound waves). I guess you could try to maximize...

Homework Statement "Using the two-dimensional wave interference pattern shown and the two equations involving path difference, complete the following. a) i) measure the wavelength of the waves, ii) the distance between sources, and the iii) path distance from each of the sources to the...

I'm trying to find out what material might best block or limit radio frequency interference (or at least I think that's the problem, as I understand it). I have a phone, the antenna inside the phone is next to a chip that controls a touch button. Whenever the phone boosts the signal to...

Homework Statement Two speakers A and B, sends out sounds at 400 hz In what distance x between speaker A and the point P is it constructive interference ? http://s716.photobucket.com/user/Pitoraq/media/Fys2121_zps9a68fef2.png.html Homework Equations λ = 2ΔL/(2p-1), v = 340...

Experiment: Imagine the dalayed time quantum eraser experiment, except the pair of "idler" photons(which would normally pass onto the detectors d1,d2,d3,d4) instead fall into a black hole. Would d0 detect interference or not? It seems commonly accepted that the information of...

A manufacturing firm has hired your company, Acoustical Consulting, to help with a problem. Their employees are complaining about the annoying hum from a piece of machinery. Using a frequency meter, you quickly determine that the machine emits a rather loud sound at 1400 Hz. After investigating...

Hi, I'm interested in AM radio transmissions causing interference (not just noise, but the transmission actually being demodulated by the speaker and leaking into the amplifier circuit) in devices such as unshielded speakers (that are not designed to work with radio). I'm currently having...

I was just wondering if anyone was aware of a good explanation or physical cause of single slit interference that doesn't involve the Huygens-Fresnel principle. To me, the principle is not very intuitive, light does not eminate from other light (as far as I know). I think I understand that the...

Hi, there Today, a friend came to me and asked the following questions and they made me confused. If the source is strong, the light has to be considered as wave, and the double-slit interference (DSI) can be interpreted, and the conditions for the DSI is (1) same frequencies, (2) parallel...

Hi, there Today, a friend came to me and asked the following questions and they made me confused. If the source is strong, the light has to be considered as wave, and the double-slit interference (DSI) can be interpreted, and the conditions for the DSI is (1) same frequencies, (2) parallel...

Hi Everyone This is a question which, in various forms has been asked in various places on the Internet but I have never seen a satisfactory answer. I have therefore decided to try and ask it in a unique way which will start off conventionally to begin with. If I have two side-by-side lasers...

This question is about the interference pattern observed when the waves from two microwave transmitters interfere. The first parts of the question involve the wavelengths of microwaves being the same for each transmitter. For the last part the question proposes that the wavelength of one of...

Can someone maybe explain me(or has a good link to a page where this is explained) why scattering in perpendicular direction is suppressed by destructive interference for large particles. i'm trying to understand mie and rayleigh scattering and don't really get why there is no scattering in...

I'm wondering something about illustrations of single slit interference. I've seen them being illustrated in different ways. One way is this: and another way is this: But I don't understand how these can show the same thing? In the first picture, we have light rays that are obviously NOT...

Hello, I'm having a hard time understanding why diffraction grating spots are narrower than those produced by a double slit set-up. I would really appreciate a conceptual understanding but math works too. Thank you

If leptons can stack up on top of each other and not interfere than how can a single lepton do so in the two split experement?

Homework Statement Optical lenses (n=1.40) in cameras are coated with a thin film of magnesium fluoride (n=1.38) to reduce reflections. What minimum thickness is required to give minimum reflection at a wavelength of 550 nm? Homework Equations 2nt = (lamda)/2 The Attempt at a...

Homework Statement Two speakers with the same power output generate sound waves in 360 degrees direction. Both speakers have the same freuqncy and the distance between the speakers is given. How can we from this calculate the sound intensity at any given point around the speakers...

Homework Statement One speaker is located at the origin and the other is located at (x,y)=(0,3.00m). The speakers emit identical sound waves of wavelength 2.00m which are initially in phase. Where does constructive interference occur? ANS: x=1.50m The Attempt at a Solution...

Homework Statement Two loudspeakers, A and B, are driven by the same amplifier and emit sinusoidal waves in phase. The frequency of the waves emitted by each speaker is 172 Hz. You are 8.00 m from speaker A. Take the speed of sound in air to be 344 m/s. What is the closest you can be to...

I have a wifi card for a cisco router that has two antennas spaced about an inch apart. The antennas can pivot so that the distance between the same point on either antenna can change. Since the antennas don't remain a wavelength multiple apart at all points on them, why is it that they don't...

please,I have exams on Tuesday and I need someone to solve this question for me so that I will pass my exams. Your helps will be kindly appreciated.

Suppose we have the Young's experiment with a convergent lens between the slits and the screen. How would the interference fringes change? Sorry about the silly question, but I'm having a hard time with geometrical optics. Thanks!

http://imageshack.com/a/img834/5921/7iap.jpg Homework Statement Consider the double slit pattern shown above where the distance between slits is d. Each lettered point is labeled according to ΔD, the difference in distances from the slits to that point. ΔD is expressed in terms of wavelength...

I know this is a very trivial concept, so can someone please point out to me where I'm going wrong with this? We use coherent waves to observe an interference pattern, and coherence by definition is the presence of a constant phase difference between two waves. Yet, we see bright and dark...

I can't get my head around the fact that for the interference of two waves to occur, the two sources producing the waves must be coherent (Well, that's what my A level Physics book says). Wouldn't it perhaps be more appropriate to say that coherence is only a necessary condition if an...

Hello. I have 2 large diameter cylindrical shells that are "rabbetted" together. I am trying to determine the approximate load required to pull them apart without much success. The parameters are as follows (all length dimensions in inches) and result in a .005" (diametric) interference...

I'm a little confused about a small detail when finding the intensity over the screen, as some notes I'm using happen to calculate the same thing twice, with a slight difference the second time. Each method does the following Call the electric field at any point E so we have...

So three problems I am stuck on. 1.) You have a converging lens with n=1.5,for a symmetric lens so the two lens have same magnitude, what should the radius of curvature be so the focal length is 10cm. I know 1/f = (n-1)[1/r1-1/r2] so that is 1/0.10m =(1.5-1)[1/r1-1/r2] where I am lost is in the...

Homework Statement In a Young's double-slit experiment, a set of parallel slits with a separation of 0.102 mm is illuminated by light having a wavelength of 580 nm and the interference pattern observed on a screen 4.50 m from the slits. (a) What is the difference in path lengths from the two...

1. A sound wave with frequency f = 2300Hz is sent into a circular tube of radius R=160cm through an opening at some point A. A receiver lies at point B, separated from A by an angle α=130°. The speed of sound in air is v=330 m/s. Sound propagates from A to B in both directions along the...

A laser's beam is split and then recombined, and the two path delays are adjusted so there is destructive interference at a detector. Let's also say one of the two paths has a measurable delay over the other. Classically speaking, when the laser is first turned on, the detector would be...

When in a pure state, a particle exhibits interference effects in experiments. Wavefunction collapse alters this pure state: if two particles A and B at the opposite sides of a galaxy are entangled, does it mean that interference experiments done using A vary depending upon whether B has been...

Why the interference patterns are separated when there are many light beams transmit through the film? Thanks!

1)What is the difference between standing waves,beats and normal interference of any 2 waves ? 2)Is beats in sound waves same as interference in light waves ? 3)Why do we represent particle displacement with y and wave motion with x in longitudnal waves in which both particle and wave motion...

When you shine light on a mirror perpendicularly. Does the reflected beam then not interfere with the incoming one? With my intuition it would, and the interference would oscillate between destructive and constructive interference. But then why don't I see that when I do the experiment?

Homework Statement A system illustrated in the figure consists of two coherent point sources 1 and 2 located in a certain plane so that their dipole moments are oriented at right angles to that plane. The sources are separated by a distance d, the radiation wavelength is equal to ##\lambda##...

Homework Statement Light of wavelength 550 nm in air is normally incident on a glass plate (n=1.5) whose thickness is 1.1 X 10^-5 m. (a) What is the thickness of the glass expressed in terms of the wavelength of light in glass?(b) How many reflected waves will experience the 180 degree phase...

Homework Statement Two antennas located at points A and B are broadcasting radio waves of frequency 99.0 MHz, perfectly in phase with each other. The two antennas are separated by a distance d= 12.40 m. An observer, P, is located on the x axis, a distance x= 58.0 m from antenna A, so that APB...

I have a doubt about the interference wave pattern of double slit experiment with light beam. does it mean the interference of electromagnetic wave (which tells about the frequency causing color) or Spatial probability wave (which was explained by Max Born). I am not good at math. can someone...

Can someone please help explain an experiment which I am struggling to understand. You have a speaker without any of the outer casing (just the small disk part) and secure it onto a clamp stand. You then have two microphones; one above the speaker and one below it which are both the same...

Homework Statement A beach comber walking along the top of a sea wall notices that the waves reflecting off of the concrete breaker are creating a pattern of interference with the original incoming waves. A few meters from the breaker the waves are at maximum oscillation with a time between...

The classical physics developed by people such as Fraunhoffer and Fresnel seems to work very well at predicting the results obtained when observing interference and diffraction patterns. Quantum theory seems to work well also and can be used,for example when photons are sent one at a time...