春运迁徙呼唤商贸驱动客运综合交通枢纽
百度 20多年来，他把每一位离退休老同志视为亲人，从点滴做起。
Optics is the study of light, and its interaction with matter. It includes topics such as imaging systems, fiber optics, lasers, quantum optics, and more.
8,091 questions
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Advice on Choosing a Physics Domain with High Potential for PINNs-Based Research (Final Year Thesis) [Physics Informed Neural Networks] [closed]
I'm a final-year undergraduate student at IIT Roorkee, India, currently working on my thesis involving Physics-Informed Neural Networks (PINNs). My goal is to narrow down a well-defined research ...
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Is the optical effect of mixing water with different salinities called schlieren?
When swimming in a fjord, where rivers etc. can produce a fresh water layer at the surface, one can often see an optical effect of mixing two water masses with different refractive indices. (I've ...
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2
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Paradox regarding propagation of a pulse wave
In optics, we often use the complex amplitude to specify the electric and magnetic fields at any instant.
A rightward-propagating plane wave can be expressed as
$$
\exp(ikz)
$$
and
$$
\exp(-ikz)
$$
is ...
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Including laser linewidth in the master equation
Suppose I have a modified Jaynes-Cummings hamiltonian $H_S$ with two cavity modes. I have derived the master equation for this system including decay of both cavity modes: $$\dot{\rho} = -i/\hbar [H_S,...
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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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Does conservation of etendue preclude reflecting sunlight from space?
I am an aerospace engineer. I recently became familiar with an aerospace startup called Reflect Orbital, which has received millions of dollars to pursue development of space-based mirrors to provide ...
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Detecting the presence of clear tape on material [closed]
I am trying to find a way to optically detect the presence of clear tape, like Scotch tape and packaging tape, if it's stuck on a piece of paper or other plastic.
The paper the tape is on will not be ...
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Dispersion: Denser to rarer medium
We have studied dispersion of a ray of white light when it goes from denser to rare medium (from air to glass). But when the ray of light comes out on the other side, do the various light rays get ...
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Infrared shadows
Many invisible gases (such as propane) can only be seen with infrared cameras. They do not cast a shadow to the naked eye.
My question is whether they are likely to cast a shadow to an infrared camera....
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How to implement the model of a chirped volume bragg grating to a classical SSF scheme for optical pulses compression? [closed]
I modeled the reflectivity and group delay of a Chirped Volum Bragg Grating (CVBG) using transfer matrix (MATLAB code). Leading to :
Yet, I struggle to find a formula using the above results to ...
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Explaining optical properties of silver
Recently I was introduced to the concept of Lorentz and Drude's model for optical properties of metals and dielectrics.
For metals what I learned was that above a certain limit (the Plasma frequency), ...
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Can a straight and smooth object at rest have a wavy/curved shadow?
There's an object (partition between windows), whose shadow falls upon a curtain inside the room. However , the curtain is not still , it's moving (due to interaction with air) due to a fan working ...
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48
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How much faster does quartz glass cool via radiation compared to opaque substances?
Throw a piece of quartz glass (or any other transparent object with a high melting point) into space and uniformly heat it up to a certain temperature, say 1500 K. At this temperature, quartz glass is ...
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2
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Can we derive laws of reflection by treating reflection as a form of wave scattering theory?
My professor once told me that reflection of light is fundamentally a form of the scattering of (electromagnetic) waves. When I asked him to explain it a bit his response was the following. When light ...
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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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