The interference tag has no wiki summary.
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30 views
What is the equation for condition of obtaining a bright spot in a wedge shaped film?
I want to know if the condition for obtaining a bright spot in a wedge shaped film is
$2 \mu t\cos(r+\theta)=(n+\frac{1}{2})λ$
or
$2 \mu t \cos(r+\theta)=(2n-1)λ/2$ .
$t$ = thickness
$r$ = angle ...
3
votes
3answers
102 views
Do laser beams interfere noticeably with each other?
I want to arrange some red lasers along a 90 degree arc of a circle, aimed towards the center of the circle. When their beams hit the opposite side of the circle, will I notice any interference ...
2
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0answers
38 views
What is three-photon interference?
Whilst reading this paper on a quantum processor that performs a type of matrix computation, I came across the concept of 'three-photon interference'. A quick Google search shows that this process is ...
0
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0answers
14 views
Minimum thickness of bubble ensuring max reflectance
A soap bubble has index of refraction of 1.33. What minimum thickness of this bubble will ensure max reflectance of normally incident 530 nm light?
Ans is 99.6, but how do I get that?
I am ...
0
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1answer
46 views
EM Waves Energy Loss
Where does the energy go when two photons interfere destructively at a point on a screen in Young's double slit experiment ?
6
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3answers
175 views
supressing certain decay paths and enhancing others with interference
In a scattering reaction, there are many possible final states for the products, each with different production rates.
Question: Is there a way in which we could in general supress certain rates ...
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0answers
29 views
The interference of waves and factors that affect cancellation?
If you had two repeated disturbances on the surface of a water, I know interference will occur. However, if I move the two sources of disturbances closer together, why would the 'gaps' between each ...
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0answers
26 views
Interference of 2 slit experiment when glass is put infront of 1 slit (+0.5 lambda optical path)
The question and answer is given in the image below:
I don't really understand how to work this out myself. How do I relate $+\frac{1}{2} \lambda$ to (phase difference) $\Delta\Phi = \pi$
UPDATE
...
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1answer
60 views
Can we use intensities in the superposition principle?
In using the superposition principle to calculate intensities in interference patterns, can we add the intensities of the waves instead of their amplitudes? I think that amplitude account for the ...
3
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1answer
157 views
Single photon interference experiment
In short: the question is, does the length of the path affect the outcome of detecting a photon?
Consider the single photon beam splitter experiment. Does the probability of detecting the photon ...
0
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1answer
107 views
Young experiment: square of classical real wave function
I can't understand why the sum of two real waves result in a time dependent wave, but not so for the complex waves.
In details, I can't get this passage on p.38-39 in A.C. Phillips, Introduction to ...
6
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2answers
278 views
Where does energy go in destructive interference? [duplicate]
I have read that when two light waves interfere destructively, the energy contained within is transferred to other parts of the wave which have interfered constructively. However, I am having some ...
1
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0answers
213 views
How to calculate the intensity of the interference of two waves in a given point?
There are two different point sources which produce spherical waves with the same power, amplitude, ω, wavenumber and phase.
I can calculate the intensity of each wave in a point:
$$
I_1 = P / (4 ...
5
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3answers
875 views
Why don't waves with different wavelengths interfere with each other in white-light?
The book I'm reading about optics says at some point that "each color (wavelength) contained in the white light interferes only with itself". But why is this so?
Edit: I moved the rest of the ...
1
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0answers
39 views
How to make DIY flight detector for double slit experiment?
I want to reproduce double slit experiment. So, is it possible to build flight detector (situated near one slit) at home? Is it possible to buy it somewhere?
0
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3answers
99 views
How do I determine where I can no longer hear sound?
A teacher stands well back from an outside doorway that is 95 cm wide and blows a frequency of 600 Hz. The door faces north. Assume the speed of sound is 340 m/s and that there are no reflections. At ...
0
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0answers
54 views
Nonmonotonic quantum-to-classical transition in multiparticle interference [closed]
"Nonmonotonic quantum-to-classical transition in multiparticle interference " (arXiv:1109.1636)
How do people here think about this? If this paper is right, it seems there are a lot to mean to ...
1
vote
1answer
107 views
Kiessig fringes
I have come across many papers but still couldn't find the relationship between index of refraction or atomic scattering factors, and reflectivity.
My flow of thought goes as follows:
Get the ...
-3
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1answer
150 views
how to simulate wave interference [closed]
I need to simulate wave interference with reflection from surfaces.
What formulas I need to use?
What differential equation I need to solve? - Could someone help me out?
1
vote
2answers
207 views
Double slit experiment alternating holes
If we perform the double slit experiment by shoting photons covering one hole at a time, would we see equally the double slit interference?.
That is, the same set up of double slit but fire photons ...
2
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4answers
610 views
Young's double-slit experiment with detectors
Related: Accuracy of various optical instruments
In many books, it's written that knowing which slit a photon passes through (by placing a detector before the slit) in a Young's double-slit setup ...
3
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2answers
118 views
Probability wave speed of dispersion and interference
I'm a layperson learning about quantum mechanics and probability waves. My understanding is that the probability wave for the position of a particle disperses throughout all of the universe.
I have ...
3
votes
3answers
579 views
Why does light in a room not form constructive and destructive interference patterns?
This is something that I have wondered for a long time. How come when I walk around why do I not see random black spots where light has collided destructively and bright spots where it has collided ...
5
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3answers
301 views
Triple slit experiment
If the experiment is done with single photons and a "detector" at one of the slits the interference pattern breaks down.
What happens if three slits are used with single photons and a "detector" at, ...
2
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0answers
84 views
photon and Z boson interference?
I'm not certain that this question will make sense, but here goes...
In most monte carlo generators, when Z events are produced, there is a lower mass cutoff on the Z pole. I've been told that this ...
2
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1answer
154 views
Considering the wave function is not 'real', what is interfering?
I find the idea of the wave function being 'just' a collection of numbers (probabilities) quite alluring, and elegant in explaining away the whole 'collapse' business (see Luboš' answer to this ...
0
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3answers
398 views
Single photon and double-slit experiment
Laser fires single particles of light, called photons, through the slits. Even though only single photons of light are being fired through the slits and They create three pattern again. How single ...
1
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2answers
176 views
Interference, photon's phase, and the Hilbert space
Dirac said that a photon can only interfere with itself. This is consistent with the tensor product of two photon spaces representation. On the other hand, it is known that there is interference ...
2
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3answers
317 views
What does the differential of $d_s\sin(\theta) = m\lambda$ help us see, with respect to waves through diffraction gratings?
With respect to waves traveling through a diffraction grating, we have an equation like this one: $$d_s\sin(\theta) = m\lambda.$$
Where $d_s$ is the distance between slits in the grating, $\theta$ is ...
3
votes
1answer
812 views
Purple doesn't occur in rainbow - or does it?
Usually, when asked whether the purple color exists rainbows, an answer similar to this is given:
The purple color is perceived by human eyes via the activation of both red-sensitive and ...
1
vote
1answer
746 views
Light interference maximum and minimum intensity points
This is a very basic question, but I just forgot how to solve this. It's classical physics question.
Suppose that there are two light sources. And some place away exists a screen. How do I find ...
2
votes
2answers
188 views
A question on intereference experiment with water waves as given in the Feynman Lectures on Physics
I have a question related to the interference (thought)experiment with water waves given in the book Feynman Lectures on Physics Vol.3. When only one hole (hole 1) is open the measured wave intensity ...
24
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10answers
3k views
What happens to the energy when waves perfectly cancel each other?
What happens to the energy when waves perfectly cancel each other (destructive interference)? It appears that the energy "disappear" but the law of conservation of energy states that it can't be ...
1
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2answers
213 views
Can electrons change the frequency of light as they bounce off/around?
I know that light does not interact with other light, but can interfere it, at least its amplitude. With that said, lights frequency can be changed via bouncing off matter, where matter might absorb ...
1
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1answer
292 views
How Light or Water Intensity is equal to square modulus of wave function of Light or Water Waves $I=|\psi|^2 \,$?
I've seen the Wave Function as a psi $\Psi$ $\psi$.
And always heard that the wave function is the Complex Number as Imaginary and real number.
But I've never seen it
I've never seen components of ...
3
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1answer
69 views
Describing quantum intereference with only currents and densities
I know about and believe to understand the general wave equation based Kirchhoff diffraction formula, which in the Fraunhofer limit leads to a farfield complex wave function by Fourier transforming ...
1
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1answer
294 views
Double-slit experiment with alternating on-off switch
Suppose we perform a double-slit experiment with a detector placed at a position of minimum intensity (maximum destructive interference), off-center where the path lengths differ by half a wavelength. ...
3
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3answers
271 views
Which is the biggest object which can interfere with itself?
I've heard that scientist proof that viruses of the Tobacco mosaic virus could interfere with themselves. I'm referring to quantum interference-- the same as photons. Unfortunately, I couldn't find ...
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5answers
3k views
13
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3answers
1k views
Newton's rings: What causes the other rings?
This is from an experiment we did in physics class. We shone a sodium light at a convex lens on top of a sheet of glass - and this image was captured by a USB microscope. I know what causes the main ...
5
votes
1answer
172 views
Are two polarization states of light coherent?
Let's consider a situation: we have distant point source of unpolarized light in certain non-zero range of wavelengths (it's polychromatic). Let's divide this light into 2 beams depending on ...
5
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2answers
279 views
Two paths having the same phase in the path integral approach
In the path integral approach to Quantum Mechanics, can two distinctly different paths of the possible infinite paths have the same phase, i.e can there be a bimodal distribution of the phases ...
4
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2answers
139 views
What are the lines visible between two cards held edge-to-edge?
Hold two cards (say credit cards) edge to edge, anything from a very slight
touch to about 1/3 mm separation, in front of any ordinary light
source. When I do this I see several
fine dark parallel ...
11
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4answers
1k views
Energy conservation and interference
I have a problem with energy conservation in case of interfering waves.
Imagine two harmonic waves with amplitudes $A$. They both carry energy that is proportional to $A^2$, so the total energy is ...
8
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6answers
1k views
How come an anti-reflective coating makes glass *more* transparent?
The book I'm reading about optics says that an anti-reflective film applied on glass* makes the glass more transparent, because the air→film and film→glass reflected waves (originated from a paraxial ...
11
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5answers
799 views
Double slit experiment near event horizon
What happens if you perform a double slit experiment near an event horizon, if one of the slits is outside, one is inside the event horizon?
1
vote
1answer
308 views
Why do I hear beats through headphones only at low frequencies?
I was recently playing with this Wolfram Demonstrations applet, which demonstrates beats.
At first I thought the app didn't work because I couldn't hear any beats. Then I realized that the applet ...
0
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0answers
51 views
on interference [closed]
A laser is oscillating at two frequencies v1 and v2 such that v2-v1=c/2l where resonator length. If the laser is used in an interference experiment,what is the minimum path difference between ...
16
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5answers
2k views
Does a photon interfere only with itself?
I sometimes hear statements like that:
Quantum-mechanically, interference pattern occurs due to quantum interference of wavefunction of a photon. Wavefunction of a single photon only interferes ...
2
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2answers
222 views
Find drop-off rate of magnetic interference from a mass of pure iron on a magnetic compass
How can I find the magnetic interference a stationary 35000 kg block of 100% pure iron would have on a magnetic compass and what the drop off rate of the interference would be.
So if said 35000 kg ...
