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Physics : Recent Questions and Answers (Page 35)

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

Faradays law and EMI confusion

According to EMI definition, it is the changing magnetic field acting ON the conductor that induces an emf. However when using Faraday’s law, instead of finding the changing magnetic field...

Asked on 10/29/2021

2 answer

What is “spectral turnover”?

In a paper which deals with the spectra of radio frequency cosmic events, the word “spectral turnover” is used. What is “spectral turnover”?...

Asked on 10/29/2021

1 answer

$rm SO(10)$ grand unified model restores the parity symmetry lost in $rm SU(5)$ model

It is said in Lie Algebras in Particle Physics 2ed - From Isospin to Unified Theories (Georgi, 1999) p.285, Georgi said that$rm SO(10)$ grand unified model restores the parity...

Asked on 10/29/2021

0 answer

Can there be a theoretical synchronised ‘now’ moment at all points across the universe?

Einstein’s relativity rejects the notion of a universal ‘now’ moment. It underlines how the concept of ‘now’ is compromised due to time passing at differing rates in differing frames of...

Asked on 10/29/2021

5 answer

Variance of an observation of an arbitrary state measured consecutively by two operators

If A and B are two commuting observables, and the observable A is first measured on an arbitrary state, and then B is measured on the resultant state, what is...

Asked on 10/29/2021 by Sacredmechanic1

1 answer

Writing wave equation for a wave in two different media

Consider a young's double slit set-up in water. Consider a point $p$ on the screen , such that $S_{2}P-S_{1}{P}=s$.Then , Wave equation for wave from $S_{1}$...

Asked on 10/29/2021

1 answer

A moderate introduction to Hanbury Brown Twiss interferometry in particle physics

For astronomy, as originally invented, the Hanbury Brown Twiss interferometer is good for finding the angular diameter of stars and is not a rapidly fluctuating observable like the...

Asked on 10/29/2021

1 answer

The Purcell effect, it's influence on the lifetime and quantum yield (of fluorophores)

So I've been looking into the Purcell effect and how it interacts with fluorophores (fluorescent molecules). The Purcell arises when you have a dipole in a cavity or even just...

Asked on 10/29/2021

0 answer

Derivation for number of photons assigned to to an electromagnetic field amplitude

I am trying to understand a derivation concerning the number of photons associated with an electromagnetic field which is irradiated on some probe. The point is to get a...

Asked on 10/29/2021

1 answer

Book recommendations for Fourier Series, Dirac Delta Function and Differential Equations?

I'm a second-year undergrad and currently taking a course in Mathematical Physics which covers the topics of Dirac delta functions, Fourier series, Fourier transforms and Differential equations. They recommended using...

Asked on 10/29/2021

2 answer

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