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Physics : Recent Questions and Answers (Page 543)

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

Gravitational force and Electromagnetic force?

I found this interesting note in one of my textbooks,The enormous strength of the electromagnetic force compared to gravity is evident in our daily life. When we hold a book...

Asked on 02/22/2021

3 answer

Regarding Dirac equation heuristic formulation

So in the Wikipedia Page of Dirac equation we are presented with this equation$$nabla^2 - frac{1}{c^2}frac{partial^2}{partial t^2} = left(A partial_x + B partial_y + C...

Asked on 02/22/2021 by test00alone

1 answer

Gravitational redshift in terms of wavelength

I know that Einstein’s theory of general relativity predicts that the wavelength of electromagnetic radiation will lengthen as it climbs out of a gravitational well. Photons must expend energy to...

Asked on 02/22/2021

1 answer

How much light is there in space and how heavy is it?

Our night sky is filled with stars. On a dark night a significant fraction of the sky is light. This light, we are told, has been in transit for many...

Asked on 02/22/2021

3 answer

Can a prism be used to average all the light waves falling on one end?

This may be outside the scope of this site, but it's worth a try. Years ago, some time between 1989-1992, I was living in Bridgeport CT and working as a...

Asked on 02/22/2021 by Beartech

0 answer

How exactly do quarks suppress gluon fluctuations?

In both this Veritasium Video and this answer it is said that Quarks suppress gluon fluctuations, thus creating a so-called 'flux tube' which is what binds...

Asked on 02/22/2021

1 answer

A reduced form for two qubits' density matrix

I know that we can write the density matrix of two qubits in the form$$rho = frac14(I + mathbf{a}cdotvec{sigma}otimes I + I otimes mathbf{b}cdotvec{sigma} + t_{ij} ,...

Asked on 02/22/2021 by riddle lover

0 answer

Specific Heat Ising and Heisenberg Model

I have found when temperature limits to zero specific heat of Ising model results as 0. However, for Heisenberg model for limiting to 0 gives a constant. Why do these...

Asked on 02/22/2021

0 answer

Comparison between two flavor neutrino oscillation and a system of up-spin and down-spin states of an electron?

In the system of up-spin and down-spin states of an electron, we can write a general state of electron at time $t$ as $$left|psi(t)right>=aleft|uparrowright>+bleft|downarrowright>,$$ where $left|uparrowright>$ is up-spin state and...

Asked on 02/22/2021 by user176263

2 answer

Queries about chemical potentials

I've been working on this problem for a little bit and haven't made a whole lot of progress. For part (a) I used a formula for calculating the relative chemical...

Asked on 02/22/2021 by Ronan

2 answer

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