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Physics : Recent Questions and Answers (Page 793)

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

The fine structure constant

I have a question about the really meaning of the fine structure constant. Actually, my doubt is why the physicist look to a meaning for this constant.I understand the...

Asked on 11/26/2020

4 answer

Relation between BPHZ renormalization and on-shell renormalization

I am following Sidney Coleman's lecture of Quantum field theory where in ch 25 he talked BPHZ renormalization and in ch 23 he talked about on-shell renormalization of spin-1/2 theory....

Asked on 11/26/2020 by ocf001497

0 answer

Topology of Renormalization group trajectories

In The renormalization group by Matthew Schwartz the is very interesting picture of RG for dimension and dimensionless couplings: Topology...

Asked on 11/26/2020

0 answer

Probabilistic determination of syzygy

Is there a framework for describing the probabilistic confidence of an $N$-body syzygy? Forgive me if I'm misusing terminology: I'd like to know how physicists/astronmers model the confidence of...

Asked on 11/26/2020 by batlike

0 answer

Confusion in definition of emf

The emf of a cell is defined as the work done per unit positive charge in taking it around the complete circuit of the cell (i.e. in the wire outside...

Asked on 11/26/2020

3 answer

Why is the chemical potential of a photon gas 0 (mathematical argument)?

$$dU=TdS-PdV+mu dbar{N}$$ $$mu=left(frac{partial U}{partial bar{N}}right)_{S,V}$$ The energy of each photon is given by $hbaromega$ (each photon obviously carries energy). Therefore the addition of a photon to a...

Asked on 11/26/2020 by Pancake_Senpai

4 answer

Does maximum velocity change when vertical mass-spring system is used in different location on Earth in SHM?

Let me elaborate for you my concerning I am thinking of a example of a vertical mass spring system. Suppose i place my system at equator, let suppose a wall...

Asked on 11/26/2020

1 answer

Doppler effect and constant velocity of a wave

Why doesn't the velocity of a photon change when it is emitted from a source moving with certain velocity? If a photon is a particle then it should have a...

Asked on 11/25/2020 by SRIVISHNU BHARAT

3 answer

Some confusing sentences on binding energy

I'll paste the exact lines of my textbook:(I) For nuclei of intermediate mass number 30<A<170 the binding energy per nucleon is almost constant.(II) For light and heavy nuclei...

Asked on 11/25/2020 by ZMeson

0 answer

In matter-antimatter interactions, what's the meaning of "touch"?

In this question, the top answer gave a seemingly good description of the particle interaction, but what exactly the interaction is seemed to be left unstated. I've only the...

Asked on 11/25/2020 by Carlos Arturo Serrano

1 answer

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