Physics Questions, Problems & Solutions : TransWikia.com ~ Page 720

Einstein Field Equation for a Garfinkle-Horowitz-Strominger theory

Consider a gravitational theory with a dilaton field and the action being given by Charged black holes in string theory (this link contains...

Asked on 12/21/2020 by fangzhang mnm

1 answer

Momentum of light in anisotropic media

This question is related to the Abraham-Minkowski controversy that has already been discussed extensively here and in the research community. But I want to ask about an aspect of this...

Asked on 12/21/2020 by Tornado

1 answer

Work done to construct a uniformly charge sphere

I made some calculations and I got a correct answer, although I lack the intuition and I have no idea why it works. Say we want to build a uniformly...

Asked on 12/21/2020

1 answer

Finite double potential barrier transmission coefficient

TL;DR: I want to calculate the transmission coefficient of a particle travelling into a finite double potential barrier system and I think I've got stuck by the fact that I...

Asked on 12/21/2020 by fintallrik

1 answer

Commutators and coordinate-induced basis (General Relativity)

There is an exercise in MTW that asks to prove that, given two vectors u and v, there exists a coordinate system for which$$textbf{u}=frac{partial}{partial x^1} mbox{ and...

Asked on 12/21/2020 by Rafael Mancini

1 answer

Why does oil look darker when viewed from the side of the glass which it is filled in?

I used a glass container containing oil water mixture. Does it have something to do with the glass? Or the thickness of the two layers?Please excuse if it isn't...

Asked on 12/21/2020 by Krishna js

0 answer

Random Direction of Spontaneous Emission, and Conservation Laws

I'm trying to imagine how/why the direction of a spontaneously emitted photon is random, and how that works and reconciles with the conservation of momentum and kinetic energy. For intuition,...

Asked on 12/21/2020 by amazonprime

1 answer

Reversibility of compressed air sinking in water

Consider an apparatus in which air is trapped in a small insulated container with an open bottom, and weighted with weights so that the air is slightly above neutral buoyancy....

Asked on 12/21/2020

2 answer

What is the specific derivation of the speed changes in the two equations from which Einstein originally inferred the relativity of simultaneity?

The two specific equations I’m asking about were stated at an introductory stage in the famous 1905 paper which launched Special Relativity. He didn’t explain how this derivation was arrived...

Asked on 12/20/2020 by Timm

1 answer

Coherent = Incoherent

A coherent source looses it’s coherence as it propagates, but an incoherent source gains coherence as it propagates. This 28 sec video illustrates this.This 28 sec video...

Asked on 12/20/2020 by Lambda

1 answer

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