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Physics : Recent Questions and Answers (Page 528)

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

Why is Pascal's law true?

Pascal's principle state that if an external pressure is applied to a confined fluid, the pressure at every point within the fluid increases by that amount. Is there a...

Asked on 02/27/2021

3 answer

Cross section of elastic scattering in repulsive central potential field

today I was studying from Landau and Goldstein and I came with this problemCross section of elastic scattering in repulsive central potential field $U(r)=frac{alpha}{r}+frac{beta}{r^2}$, where $alpha$, $beta>0$My...

Asked on 02/27/2021

0 answer

Bringing P-type and N-type semiconductors together in vacuum

Consider the case where a P-type semiconductor and an N-type semiconductor are placed in perfect vacuum. Now, the two junctions are brought together.In the time immediately after they are brought...

Asked on 02/27/2021

0 answer

Why do we refer the cross section ratios to muons?

For electron-positron interactions, we have different cross sections, depending on the available reaction energy. To get an overview how many particles of a certain type have been created, we can...

Asked on 02/27/2021 by pantheon

2 answer

What is a particle in loop-quantum-gravity?

What exactly is the underlying mathematical structure of e.g. an electron in Loop-quantum-gravity? And is there a simple way to get the quantum mechanical limit so that one can see...

Asked on 02/27/2021

0 answer

Why mirrors are not used in optic fibres?

In optical fibres we reflect light by the use of total internal reflection (TIR). I know there will be some energy loss in optical fibres if we use mirrors but...

Asked on 02/27/2021 by Saksham Jain

1 answer

Given equations for the dew/bubble point curves, and given that pressure and enthalpy are known, can temperature and quality be calculated?

As mentioned, I have equations for both the dew and bubble point curves, T(P) or P(T) and also rho(T), rho(P). I also know the actual pressure, and enthalpy of the...

Asked on 02/27/2021 by casualguitar

0 answer

Is there a loss of Angular momentum in this question?

I am learning about angular momentum and I have a confusion. According to the guidelines of the website, I am not here just randomly asking random questions without thinking. In...

Asked on 02/27/2021 by Ritanshu

1 answer

Potential of a polarized hollow spherical shell due to uniform electric field

A hollow spherical shell has inner radius $a$, outer radius $b$ and is made with a material with dielectric constant $epsilon_r = epsilon / epsilon_0$....

Asked on 02/27/2021

0 answer

Laser beam visibility in atmosphere

I'm working on a science fiction story and would like to introduce lasers as a weapon. I've read a bit about the effect of very high energy breams in air...

Asked on 02/27/2021 by anthony van dalen

0 answer

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