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Physics : Recent Questions and Answers (Page 231)

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

Differentiating $nu = dfrac{c}{lambda}$

I am currently studying Laser Systems Engineering by Keith Kasunic. Chapter 1.2.1 Temporal Coherence says the following:The coherence time $tau_c$ over which the emitted wavelengths are considered to be...

Asked on 06/27/2021

1 answer

Dimensional regularisation in $phi^4$ theory

My question is in regards to the 1-loop corrections of phi 4 theory. The question is in regards to these notes: http://www.damtp.cam.ac.uk/user/dbs26/AQFT/chap5.pdf On page 15 of these...

Asked on 06/27/2021 by wysiwyg

1 answer

Measuring Green's Function

I am confused about Green's functions. I understand that $G^R(r,r',t,t')$ tells you the amplitude of a particle that was inserted into the system at position $r$ at time $t$ has...

Asked on 06/27/2021 by Heracles

1 answer

Magnetic field between the plates of a charging capacitor

Considering a parallel plate capacitor initially charged, with circular plates of radius $a$ and with a distance $d$ from each other. A battery with internal resistance $r$...

Asked on 06/27/2021

2 answer

Are there yet Optical Magnetic Mirrors (OMMs) which reflect via interaction with the magnetic field?

update 2021: As the question has remained unanswered for five years and the field of optical metamaterials has advanced, I think this question can be revisited.The...

Asked on 06/27/2021

0 answer

Defining convection boundary conditions for 1d transient heat equation in cylindrical coordinates

I am currently working on a problem with a hollow cylindrical graphite crucible that will contain liquid aluminum and I am trying to get the transient temperature function using the...

Asked on 06/27/2021 by Anonymous Person

1 answer

Parity of the eigenfunctions of Hamiltonian for a symmetrical potential

I have seen in different posts (like this one) that, in case the potential $V(x)$ of a quantum system is symmetrical, you can always find a basis of...

Asked on 06/27/2021 by Quaerendo

1 answer

Coincidence count probability in the entanglement-enabled delayed choice experiment

I'm trying to understand the entanglement-enabled delayed choice experiment and I'm kind of stuck at the term "coincidence count probability" which I can't seem to find definition...

Asked on 06/27/2021 by Sergei Tachenov

1 answer

Won't decrease in kinetic energy decrease the momentum as well?

My doubt stems from the question attached. If some kinetic energy gets converted into spring potential...

Asked on 06/27/2021 by Draculin

1 answer

Is Maxwell's equation applicable to any arbitrary Electric vector field and Magnetic vector field?

Suppose if we have a varying electric field $vec{E}$ and magnetic field $vec{B}$ that are independent and acting on particular area such that ${rm curl},vec{E}neq 0$. Then...

Asked on 06/27/2021

2 answer

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