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Physics : Recent Questions and Answers (Page 53)

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

Vector space vs affine space in Lagrangian mechanics

I want to know why is it preferred that the classical universe is seen as an affine space instead of a vector space? From my understanding an affine space violates...

Asked on 10/01/2021 by Gideon Ilung

3 answer

Examples of antiunitary operator other than time reversal operator

It is well-known that time reversal operation is implemented as an anti-unitary operator. I wonder what are some other examples of anti-unitary operators that appear in the context of quantum...

Asked on 10/01/2021 by Leo L.

1 answer

Chemical potentials of source and drain

I'm trying to learn the concept of quantum dots and coulomb diamonds, and I'm trying to read this but I have encountered a problem which I couldn't...

Asked on 10/01/2021

2 answer

Explanation of formation of Newton's rings

I was asked to do a lab report in my University about Newton's rings experiment that we made in lab. I understand that the aim of the...

Asked on 10/01/2021 by user7857462

2 answer

Proving the collapse of a many body system (Fetter and Walecka problem 1.2)

I was trying to solve the problem 1.2 from Quantum theory of many-body systems by A. Fetter and J. D. Walecka. I succeeded in the first part, obtaining the suggested...

Asked on 09/30/2021 by S. Barison

1 answer

Misunderstanding of the magnetic field

We know that any field can be constructed using its divergence and rotational. The divergence of the magnetic field is always zero. However its rotational is proportional to the current...

Asked on 09/30/2021

4 answer

Is there a formula to calculate the deviated angle of a ray passing through a prism?

I'm assuming the angle of incidence to be the number of degrees from a perpendicular line on the side of a prism the ray starts passing through... I'm trying to...

Asked on 09/30/2021 by Snipe

2 answer

Formula to get scales of the two components (radial and perpendicular) of Baryonic Acoustic Oscillations (BAO)

In an astrophysics context about BAO (Baryonic Acoustic Oscillation), it is written on the following paper BAO paper : "BAO are much smaller in amplitude than the...

Asked on 09/30/2021

0 answer

Difference between coordinate time and proper time in general relativity

I was watching a video on relativity on YouTube that talked about the difference between coordinate time $t$ and proper time $tau$ and I have a couple of...

Asked on 09/30/2021

3 answer

Structure of Mach diamonds in supersonic and hypersonic flows (SpaceX raptor engine video of Sept. 28, 2019)

Last night, SpaceX held another show and tell, and there was a nice long, almost 1 minute burn of a raptor engine. The flow stabilized really nicely, and you get...

Asked on 09/30/2021 by Andrew Gibson

1 answer

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