Questions tagged [diffraction]
Diffraction is defined as the bending or flaring of light around the corners of an obstacle or aperture into the region of geometrical shadow of the obstacle. This flaring is consistent with the spreading of wavelets in the Huygens construction. Diffraction occurs for waves of all types, not just light.
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Is this additive mixing or camera image sensor error?
I have coupled RGB laser light into 3 gratings on chip and projected the light into the the farfield and put a camera sensor on top of the beam. Here is the setup and the experiment.
What I observed ...
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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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When is the 3D Dirac delta function a good approximation for scattering?
When discussing X-ray or neutron scattering, it is usually assumed that the scattering potential is of the form
$$V_{\mathrm{eff}}(\mathbf{r}) = \sum_i b_i \delta^3(\mathbf{r}-\mathbf{r}_i)$$
with $...
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Why doesn’t the Fraunhofer diffraction prediction match what we observe with wide single slits in reality?
In experiments with a single slit (using ordinary light or laser light), when the slit width is very large compared to the wavelength , I observe that the bright region on the screen has a sharp ...
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X-ray diffraction "linewidth" due to thermal motion
I was recently learning about X-ray diffraction and I am a bit confused about how thermal motion affects the measurement.
If I understand it correctly, when measuring crystals, thermal motion does not ...
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Can a light reflection from lamp change brightness if we split it into multiple reflections with a diffraction foil?
I'm not a scientist or researcher. I've been watching a video by Veritasium on how light behaves and there was a little experiment in the end. Here is the video with timestamp
According to that little ...
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Diffraction Modeling Question
I'm trying to implement a model for diffraction-limited imaging, following "Microlithography" by Sheats and Smith. You can skip to the bottom for my question, but I'll explain the setup ...
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Confusion in Double Slit Experiment regarding fringes [duplicate]
consider the above demonstration, for double slit experiment. In this one, there seem to be two types of "gaps". one, the type of larger (relatively) gaps,(marked as A) and two, smaller gaps ...
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Why in the derivation of Bragg's law, the incident angle = scattered angle? [duplicate]
In the derivation of Bragg's law in Wikipedia here, they assumed that the incident angle is equal to the scattered angle. But every layer of atoms should act like a diffraction grating. Is somehow in ...
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How a plane wave impinging on a cube is impacting the sides of the cube?
Problem:
In the case of a cube, imagine a plane wave, directed toward the $z$ axis, impinging the $(x,y)$ face of a cube.
I am wondering what happen at the four side faces of the cube ($(y,z)$ and $(x,...
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What is the difference between diffraction and scattering?
In the context of acoustic waves interacting with small particles (for example, in medical ultrasound imaging of biological samples) I often read that when a wave encounters a particle whose size is ...
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What exactly causes this ring pattern phenomenon in optics?
I was observing this very specific pattern that I can not figure out what it is caused by.
These is not a lens flare and it is neither newton ringing pattern I think. It only shows when the aperture ...
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Diffraction through thick media
I want to calculate the diffraction pattern of light using (e.g.) the Rayleigh-Sommerfeld diffraction model.
For this, I am using the Python library Torchoptics.
However, I am struggeling on how to ...
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A new variant of the double-slit experiment
I’m curious whether quantum interference would still occur when using two slits of different shapes – for example, a rectangular slit and a circular slit – rather than the conventional setup with two ...
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Various Expressions for Fresnel distance [duplicate]
I've come across multiple formulas for the Fresnel distance in optics, which describes the transition point between the near-field (Fresnel diffraction) and far-field (Fraunhofer diffraction) regions. ...
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