Questions tagged [interference]

Interference describes different waves superposing to form a resultant wave of greater, lower, or the same amplitude. Normally, it involves interaction of waves that are correlated (coherent) with each other, either because they come from the same source, or because they have the same or nearly the same frequency. Interference effects can be observed with all types of waves, e.g., light, radio, acoustic, surface, or matter waves.

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Finesse of an Fabry-Pérot interferometer

during an undergrad experiment we have to estimate the finesse of an Fabry-Pérot interferometer. The reflectance $R$ is given so the theoretical value can be calculated by $\mathcal{F} = \frac{\pi\...
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Why do I get different colours in scratched holograms?

I was making a scratched holograms and in result got different colours instead of white hologram
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Is abruptly phase change a dominant cause in observable interferece pattern?

In newton's ring, plane parallel film or in measuring thickness of a paper we see interference pattern confirming wave nature of light. Will interference be observable if we let there is no phase ...
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3D interference visualisation software

We are searching for a software program that simply helps us to visualize in 3D the interference of planar waves of multiple sources (frequencies) and as sepctrum on a wall. Something like a well ...
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Is “reflecting back” an intrinsic property of water waves?

I have come across an interesting answer here on Physics SE which states that you get standing waves when you throw a rock in a lake, because of an “intrinsic property” of even dimensional waves. “(......
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The need for coherent sources for interference

I already know that the pattern created by non coherent sources will constantly change ( from the other answers). I want to understand why this is so My explanation (which I want to confirm): ...
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161 views

double-slit experiment showing faster than light information transfer?

In the figure shown below, a laser sends a continuous stream of a large (almost infinite) number of photons per second at a double slit, and the photons are then are displayed on a screen. The upper ...
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light intensity through a double slit [closed]

When a light source with a given intensity I emit through a double slit (or triple slit) how does the intensity of the first maxima change in regard with the initial one?
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What does the word interference “fringe” mean?

In the double slit experiment, if we are asked to find the number of interference fringes, does that mean we are asked for the number of maxima? Or the number of minima? What is the definition of the ...
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Do Photons Ever Form Just Two Lines In Slit Experiments?

Are there any slit experiments where the photons only make two lines on the screen, as if they were little bullets fired though the slits? I have conducted many double and single slit experiments and ...
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Why does a 5GHz Wi-Fi signal experience less interference than its 2.4GHz counterpart?

I am thinking in this in terms of their respective wavelengths. The signal operating at a 2.4GHz frequency would have a significantly longer wavelength than the the other signal at a 5GHz frequency. ...
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Double-slit experiment detector interference

In most of the explanation clips of the double-slit experiment, nobody talks about possible detector interference. This is the only clip that I've found to explain that the detector doesn't cause ...
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Phase difference when sources are out of phase [closed]

S1 and S2 are two point sources and the distance between them is $100.25 \lambda$ .S2 lags by $\pi/2$ then what will be phase difference between the waves at point on the line S1S2 left of S1.Actually ...
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Fringe pattern in Lloyd mirror [closed]

(source) What will be the fringe pattern on a Lloyd mirror? More accurately: Does a Lloyd mirror has same fringe pattern as Young's double slits experiment (YDSE) but just reversed and if they are ...
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Single slit experiment and the uncertainty principle - contradiction?

I have read for example here that the single slit experiment can be seen as a visualisation(?) of Heisenberg's Uncertainty principle. Basically, the photons passing through the slit are given a fixed ...
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Are we working in the double slit argumentation with destructive interference arguments?

Stimulating water with two long straight bars one could produce linear waves. Having the right distance between the bars and the correct frequency of the steady system we get in the middle between the ...
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about superposition of two sinusoidal waves

I am reading a material on introduction of interference and superposition. To go deeper, I want to know how the math works in superposition, from wiki http://en.wikipedia.org/wiki/Interference_%...
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Interferometer problem about periodic fringe patterns [closed]

Please,kindly help me; my teacher assigned me problem set, and she never went over anything about interferometers in class. Also, there is almost no information about about how to solve interferometer ...
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Why is the phase difference an “odd number of half-wavelengths” when two waves interfere destructively? [duplicate]

Excerpt from the Feynman Lectures, Volume III, Quantum Behavior (emphasis mine): At those places where the two waves arrive at the detector with a phase difference of π (where they are "out of ...
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Why alternate maxima and minima are not observable in water waves diffraction?

Below is the result of a single-slit experiment of light. Alternate bright and dark fringes can be observed, where they represent the maxima and minima caused by constructive and destructive ...
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2answers
201 views

How did scientist get photos of wave function of electron in the double slit experiment? [closed]

In the double slit experiment I know that the electron fires as a particle one at a time then splits goes through both slits and recombined and interferes with itself and hit the wall creating a ...
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Lloyd's mirror problem [closed]

My question is about the reflection of the interference pattern from the screen to the mirror itself in the(Image B), as you can see in the mirror the reflected interference pattern is similar to ...
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1answer
76 views

electromagnetic transmission in regards to environment [closed]

I'm interested in the estimation of the distance an electromagnetic signal can be transmitted. Background is that I would like to understand how materials absorb wifi-signals. For example, the most ...
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1answer
82 views

Does the total sound intensity increase when reflected?

In a closed pipe and sound it produced at one end of the tube and the other reflected the sound. If you measure the intensity within the pipe would it be greater than if there would be no reflection ...
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What does “interference” mean when referring to quantum computation?

I keep coming across off-handed references to "interference" in the context of discussions of the unique features of quantum computers. I understand that these references may mean (or seem to mean) ...
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Waves from a point source and its Intensity

Today I read that the Intensity of a point source of sound is inversely proportional to square of radial distance. My question is during the Young double-slit experiment we get a uniform fringe ...
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Between Constructive and Deconstructive Interference

Is there something other than constructive interference, such as a shift in 1/4 λ or 3/4 λ or even 7/5 λ? Because it would not end in a hill or a valley. It would be someplace between. Would it ...
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Does the double slit interference pattern depend upon probability?

If the interference pattern depends upon the probability of the particles travelling through the slit then the intensity at any point on the graph must not be zero. But graphs show that the intensity ...
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Why does interference take place even though coherence is absent in YDSE [duplicate]

(Might seem like a duplicate but is not) The original Young's double slit experiment makes use of a single incoherent source being incident on two different slits to get two coherent sources. The ...
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Wave optics, intensity distribution

Do Gaussian beams have a gaussian intensity distribution? If so, why? Does the intensity distribution depend on the profile of the light beam?
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The opposite of interference pattern of conventional double slit experiment

Given an interference pattern which is the exact opposite of the interference pattern of the double split experiment (points where delta r = nλ (n=0,1,2,...)are totally dark and points where delta r = ...
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Simple Interference of laser beams

How this laser beams interfere each other if they doesn't meet in some point of space?
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A different variation of the double slit experiment

What would be the image created by light if we do the "double-slit experiment" with a wall which has more than two slits, and what happens when we take the number of slits to infinity?
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In Young double slit experiment [duplicate]

Young's double slit experiment we can fire only one electron (particle) we can observed interference pattern? or required more than one particle to observed interference pattern?
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Diffraction grating vs single slit

When I think about it, the single slit interference experiment should resemble the diffraction grating experiment as it is almost like single slit is the equivalent of a grating with many many many ...
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Are coherent tunneling and incoherent hopping belong to quantum interference?

What the accurate definition of quantum interference in molecule or molecules? In some case, there is coherent tunneling in a molecule junction while sometime it is incoherent hopping, or even the ...
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197 views

Can cosmic rays show interference?

I read that interference in seen in waves with similar frequency, so if interference is possible for cosmic rays then wouldn't we need another cosmic ray to see this effect? If interference is ...
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130 views

Video recording interference

I'm currently working on an Android App that records while driving in a car. Similar to the popular Dashcams. While developing this App I saw a lot of ugly glitches on my videos. I used a Nexus 5 for ...
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Diffraction Grating Spectrometry Question [closed]

Yes, this is a homework question, but I've already failed to solve it enough times that the online system hosting it isn't going to give me any marks, so I figure it's a good time to stop hitting the ...
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1answer
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Single photon interference, state “top” current theory [duplicate]

Is there a simple generally accepted explanation for single photon interference? Does each photon interact with or see both slits?
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What happens when two opposite EM waves which completely destructs each other hits a wall? [closed]

I have always wondered what happens when two opposite EM waves which completely destructs each other hits a wall? Does it reflects back or does it go through it. Would be good if anyone could give a(...
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Can we use quantum physics to detect life outside our planet? [closed]

I was watching a video about "delayed choice quantum eraser experiment", it shows how our knowledge about the system can change past events if they have not been measured yet. I would like to ask ...
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How can you intuitively explain the term 'phase'? [closed]

'Phase' refers to the term encountered while studying waves (in phase, out of phase etc).
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Can Young's slit be repeated in the temporal dimension with fast-oscillating lcd's?

Can Young's slit be repeated in the temporal dimension with fast-oscillating lcd's? Young's slit demonstrates the wave-like properties of light by causing interference from two slits. Fringes caused ...
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29 views

Can we create sound that can not be affected by another sound? [closed]

example: I want to create a music program that can not be affected from other sounds. so if I wanted to play a bass or a deep rapping voice and a drum beat,the sounds won't muddy up the other sounds ...
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Non-quantum explanation for Mach-Zehnder interferometer effect

The phenomenon of all photons being detected at only one detector seems quite reasonable to me, classically. If a photon gets deflected at the first beam splitter for whatever reason, it gets ...
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Diffraction vs Interference [duplicate]

My question is simple and might even be dumb (forgive me!). But what is exactly the difference between diffraction and interference?
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Wave Function Collapse and Which Path Information

From what I understand, wave function collapse occurs when a photon/wave/particle/whatevertheheckitis which was previously in a superposition of states, collapses to one state. Now, in a double slit ...
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Constructive Interference Problem [closed]

Two loudspeakers, 4 meters apart and facing each other, play identical sounds of the same frequency. You stand halfway between them, where there is a maximum of sound intensity. Moving from this point ...
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Double slit experiment with slit having positional offset

For the double slit experiment, the slits are set up with middle part is positioned where the red line is. What happens if we move the middle part outwards to where the blue bar is? Would this still ...