Physics Questions, Problems & Solutions : TransWikia.com ~ Page 235

Plane and spherical electromagnetic waves

According to my physics book, the component of the magnetic field (in the y direction) of an electromagnetic wave can be described by the following function: (IMPORTANT: take only the...

Asked on 06/26/2021

0 answer

What is meant by unitary time evolution?

According to the time evolution the system changes its state the with the passage of time. Is there any difference between time evolution and unitary time evolution? ...

Asked on 06/26/2021 by herry

3 answer

Calculate if a beam of light will pass through a given point?

I'm not sure this should be in math or physics so i'm asking in both. Given a laser beam at closed reflective surface where point $(x,y)$ being the source...

Asked on 06/26/2021

1 answer

In a common base configuration with a pnp and VBC≈0, why does an output current IC flow when VEB < 0

Suppose a common base configuration of a standard pnp bipolar-transistor with the base grounded. The idea is to use the transistor as an ideal diode (as by the Shockley equation):...

Asked on 06/26/2021 by 8472

0 answer

What happens if two parallel square plates approach each other in a gas?

Imagine two solid massive parallel square plates, each with side length $l$ and mass $m$, approaching each other along the line that connects their centers of mass. At...

Asked on 06/26/2021

0 answer

Is galactic gravitational lensing self-magnification big enough to contribute noticeably to the galaxy rotation curve problem?

Gravitational lenses magnifies the appearance of themselves, so in the case of a galaxy it looks bigger than it is. Thus the outer stars in a galaxy seems to have...

Asked on 06/26/2021

1 answer

Explanation for possible interference on a home mirror?

I've noticed that a few peculiar things about home commercial mirrors that aren't present with industrial/scientific mirrors. This is one of the mirrors I used. ...

Asked on 06/26/2021

1 answer

The Dirac Hamiltonian

I know I can apply the Hamiltonian operator $H$ to the eigenvector and I get the energy of the state. I would like to know if the Dirac Hamiltonian...

Asked on 06/26/2021

0 answer

Help understanding proof in simultaneous diagonalization

The proof is from Principles of Quantum Mechanics by Shankar. The theorem is: If $Omega$ and $Lambda$ are two commuting Hermitian operators, there exists (at least) a basis of common...

Asked on 06/26/2021

4 answer

Principle of Maximum Work

For a problem I have been working on, I faced some difficulties in understanding some parts. The problem is as follows: A body of finite mass is originally at temperature...

Asked on 06/25/2021 by F.N.

1 answer

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