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Physics : Recent Questions and Answers (Page 315)

Find answers to your questions about Physics or help others by answering their Physics questions.

Energy spectrum of star products

We have that a property of the transition operator defining c-equivalence (or star equivalence from equation 1 in Bertelson) is begin{align*}T(fstar_Mg)=T(f)star'T(g),,end{align*} where $star_M$...

Asked on 05/23/2021 by user85503

1 answer

How to compute gauge potential $A$ from the field strength $F$?

Let $F=dA+A wedge A$ be the field strength that solves vaccum Yang-Mills equation. The question is: how to recover the gauge potential $A$? Is there any standard way?...

Asked on 05/23/2021

3 answer

Understanding the principle of photo diode signal generation

I have two lasers, both illuminate on a photo diode, i'm not very sure what's physically going on in the photo diode. My understanding is the following: The electric fields...

Asked on 05/23/2021

1 answer

Force on charged spherical bodies

I came across this question:The force of repulsion between 2 point charges is F. If the point charges are replaced by 2 spheres of finite radii carrying the same charges...

Asked on 05/23/2021 by Vivek Pandey

2 answer

Using rate and per unit time together for describing effects of motion

I have observed recently 3 different elementary definitions of velocity Rate of change of position, change in position per unit time ,andrate of change in position with respect to...

Asked on 05/23/2021 by samarjeet bhardwaj

1 answer

Formation of hydrogen atom by electron proton collision

Suppose we have an electron $e$ and a proton $p$ colliding to form a hydrogen atom that is the reaction$e+prightarrow H + gamma$ where ...

Asked on 05/23/2021

1 answer

Difference between ionization and scattering of electrons

My question is rather simple but puzzles me altogether. I'm just studying electron stopping power and I see in few graphs (particularly fig. 30.11 in PDG booklet) that Moller and...

Asked on 05/23/2021

1 answer

Confusion in Signs when formulation mathematical equations for physics problems

One of the common confusion I face when writing and solving mathematical equations for physical problems is regarding signs. Consider this problem; A ball is dropped from rest from top...

Asked on 05/23/2021

4 answer

What is zero-order transmission spectrum?

In the paper The extraordinary optical transmission through subwavelength hole arrays by T. W. Ebbesen it is shown at particular wavelength there is a peak observed in...

Asked on 05/23/2021 by Sindhu c

1 answer

A question about the Lorentz transformation of "infinitesimals"

Notations conventions: $p$ stands for the momentum (so $d^3p$ is the differential element according to which we integrate, for the $3$ space coordinates). A Lorentz transformation is...

Asked on 05/23/2021

1 answer

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