All Questions
40
questions
1
vote
1
answer
765
views
Classical vs. quantum radiation
There seems to be two forms of radiation process:
"Quantum raditation": radiation during a quantum state change, one photon is emitted.
"Classical radiation": radiation of accelerated charge, a lot ...
- 473
1
vote
2
answers
700
views
How exactly do accelerated charges produce electromagnetic waves
So I know that accelerated charges produce changing magnetic fields which in turn produce an electric field, according to Faraday's law.
(Of course keeping in mind that the electric and magnetic ...
- 581
7
votes
3
answers
491
views
Are electromagnetic waves only caused by accelerating charges?
Like the title says, are electromagnetic waves only caused by accelerating charges? Are there any other methods for the generation of photons?
If electromagnetic waves are ONLY able to be created by ...
- 195
3
votes
1
answer
631
views
Do accelerated moving electrons radiate electromagnetic energy?
Do accelerated moving electrons radiate electromagnetic energy?
Generally speaking, the charge should absorb energy instead of radiating energy in the acceleration stage, and release energy in the ...
- 345
1
vote
3
answers
208
views
Would fast oscillating charged object emit light?
If I were able to mechanically oscillate an electrically charged object at frequencies of 430-580 THz, would the object emit light?
1
vote
0
answers
29
views
Do all accelerating charge emit EM radiation? [duplicate]
A nucleus and an electron attract each other, so if they are to remain apart, the energy of the electron’s movement must balance the energy of attraction. However, the laws of physics had previously ...
14
votes
4
answers
11k
views
Why doesn't a charged particle moving with constant velocity produce electromagnetic waves?
A charged particle moving with an acceleration produces electromagnetic waves. Why doesn't a charged particle moving with a constant velocity produce electromagnetic waves? As far I understand, the ...
- 2,517
10
votes
5
answers
6k
views
Why does an accelerated charge radiate away energy?
My textbook says:
"Neils Bohr objected to the idea of an electron orbiting a nucleus in a circular orbit. An electron experiences centripetal acceleration and an accelerated charge radiates away ...
- 797
0
votes
3
answers
48
views
What is duration/extent/pattern of electromagnetic radiation at a point after it has passed that point?
Let us say I have an accelerating charge. At each point x,y,z in its path from my understanding there is a transverse electromagnetic wave being radiated (could also be viewed as a photon). The ...
20
votes
2
answers
2k
views
Does an accelerating electric dipole radiate?
For such a simple question I'm finding it remarkably hard to get a definitive answer. Googling has not helped me. Consider an ideal electric dipole that is constant i.e. neither its magnitude nor ...
- 358k
3
votes
2
answers
384
views
Does accelerating magnet emit radiation?
Just like accelerating charge produces emits radiation, does an accelerating magnet emit electromagnetic radiation?
10
votes
1
answer
952
views
Why does an accelerating neutral object not emit Bremsstrahlung radiation? [duplicate]
It is a well established fact that accelerating charges, positive or negative, emit radiation. Why then does a neutral object made up of equal amounts of positive and negative charge not emit any ...
- 155
1
vote
1
answer
107
views
Calculating acceleration of a particle from Radiation Pressure
I am trying to calculate the the acceleration of a particle from radiation pressure, assuming all radiation is absorbed. I got $$\Delta \vec{p} = \frac{\Delta U}{c_0}$$ and the intensity $I_S$=$1367 \ ...
- 113
30
votes
3
answers
3k
views
How is the energy loss by an accelerating charge expressed in the equations of motion?
I understand how, and why, an accelerating charge emits radiation, and loses energy in the process, as well as the Larmor formula for the power, and its derivation.
However, in classical mechanics, ...
- 812
10
votes
2
answers
584
views
Will a change in reference frame produce light? [duplicate]
Let's say I have a charged particle in front of me. If I start spinning in place, the charged particle will appear accelerated to me from my reference frame. If the laws of physics pertaining to this ...
