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Physics : Recent Questions and Answers (Page 751)

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

Is there a GR solution for the geocentric system?

It is possible to get the Schwartzschild metric assuming spherical symmetry, vacuum solution and Minkowski spacetime when $r to infty$. Is it possible an analytic solution for a geocentric...

Asked on 12/10/2020

2 answer

Rayleigh equation as explanation for sky being blue

I've been reading up on the internet as to why the sky is blue. The answer usually cites Rayleigh scattering that I've checked on wikipedia: https://en.wikipedia.org/wiki/Rayleigh_scattering: $$I=I_0...

Asked on 12/10/2020 by Chah

3 answer

Why do plano-convex lenses reduce spherical aberation?

I keep reading this in comparisons of different kinds of lenses but I don't understand why the flat side would change the amount of spherical aberration if the focal length...

Asked on 12/10/2020 by Faissaloo

1 answer

Can a photon's angular momentum couple to an electron spin, to cause a spin-flip (thus allowing intersystem crossings)?

Been reading up on intersystem crossing and have gotten rather confused by:a photon possesses an angular momentum of $h/2pi$ so it can couple to anelectron spin and in...

Asked on 12/10/2020 by Voetvoet

2 answer

Is thermal transfer in a vacuum proportional to temperature difference?

I would have thought that heat dissipation was proportional to temperature difference, especially in a vacuum. Is this true?...

Asked on 12/10/2020

1 answer

Rays and the ray equation: behaviour in optical systems, valid solutions to Maxwell's equations

In my studies of geometrical optics, I have encountered variations of the claim that, from what I recall, when the amplitude of the wave is changing slowly, the ray equation...

Asked on 12/10/2020

1 answer

Internal energy of a reversible adiabatic process

what happens to the heat transfer and the internal energy in a system that undergoes reversible adiabatic process back to its original state. Bearing in mind that heat $Q$...

Asked on 12/10/2020 by Adedayo Adeniji

2 answer

Interpretation of the photon scattering rate?

The photon scattering rate $Gamma$ describes the rate at which photons scatter off an atom$^1$. In a two-level system, the ansatz for the photon scattering rate often is...

Asked on 12/10/2020 by faber

1 answer

Is there any book that treat time-dependent perturbation theory with rigorous mathematics?

I am searching for rigorous mathematics books or notes for time dependent perturbation theory. For introductory quantum mechanics there is the excellent book spectral theory and quantum mechanics...

Asked on 12/10/2020

1 answer

Proof of existence of lowest temperature $0 K$

In mathematics there is the concept of infinity meaning that whenever you pick a number and say that it is the smallest/Largest there is a way to further reduce/increase that...

Asked on 12/10/2020 by The-Ever-Kid

3 answer

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