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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Understanding the relationship between wavelength and constructive interference distance in Cox and Forshaw's "clock" model
In Brian Cox and Jeff Forshaw's book The Quantum Universe, they introduce a pedagogical model where quantum particles are described by an array of "clocks" at each point in space. The length ...
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Quantum interference
I am new to quantum mechanics. Say we have a double slit experiment and we send in photons. Assuming a 1D scenario for simplicity. The intensity at the camera plane may be described by the following ...
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Impact of reference frame on the phase difference derivation in a 3-slit interference setup
I am trying to find the relative intensity $I(x)/I_{max}$ as a function of the position $x$ on a distant screen for a three-slit interference setup.
The Setup:
We have three coherent point sources ($...
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Phosphor screen function based on its position
These two pictures show two position sensitive counting system but the first picture is specifically designed for electron counting and the second is designed for photon. Both are using fluorescent ...
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Reflectogram deconvolution via bilinear forms
I work with highly coherent laser light 1550 nm source traveling through singlemode fiber. EOM creates laser pulses ~100 ns length corresponding to $m\approx 10$ m length of pulse. I can tune laser ...
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What happens if a slit is placed at a dark fringe in Young’s double slit experiment and used as a source for another double slit setup?
In a standard Young’s double slit experiment, we know that bright and dark fringes appear on the screen due to constructive and destructive interference.
Now imagine this variation:
A slit is made ...
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How do we get bright fringes in single slit experiment?
I’m trying to understand how an interference pattern is produced in the single slit experiment. Specifically, how the non-central bright fringes are produced. I’m looking for more of an intuitive ...
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Why do we allow projective representations of symmetries if interferometry can reveal the "global" phase?
Here is my understanding of the standard logic of how symmetries work in quantum mechanics. (For the purpose of this question, I'll stick to spatial rotations in the context of nonrelativistic QM for ...
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Frequency of the sum of two sound waves [closed]
I'm trying to solve the following problem:
A stationary receiver hears two sounds coming from two vehicles moving away. Vehicle A emits a sound at a frequency of 400 Hz and moves away at a speed of ...
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Blazed transmission grating
I'm having trouble figuring out why the max intensity envelop (i.e. single slit intensity peak) would be separated from zero order of the grating, for a blazed transmission grating.
In the left ...
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Interference of waves in YDSE
I am new to YDSE (Young's Double Slit Experiment) so kindly bear with me if my question is simple.
My professor said that for interference to occur, the two sources must have the same frequency - only ...
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Does electromagnetic energy disappear during a single destructive interference of finite pulses?
I am considering interference between finite electromagnetic pulses, not continuous plane waves.
Pulse 1 travels along the +x direction with a transverse electric field
$$\mathbf{E}_1 = +\hat{\mathbf{...
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Can destructive interference make light pass through a solid film?
I recently came across a video on YouTube that shows a really strange optical experiment.
In the video, two coherent laser beams are interfered such that a destructive interference point is formed.
At ...
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Interference Pattern
In standard YDSE, if the slits are placed collinear to each other, and are placed parallel to the screen, the pattern observed on the screens are hyperbolic fringes.
But if these slits are place ...
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Superposition of light beams by $\pi$ phase differences [closed]
What happens if we prepare superposition of two monochrome sinusoidal beams of light which are exactly the same but have $\pi$ differences in their phases? getting nothing?!
$$E_1+E_2 = A\cos(kx-\...
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