All Questions
40
questions
6
votes
5
answers
2k
views
Does a rotating ring of charge radiate power or not?
The Larmor Formula suggests that the power radiated by an accelerating charge is non zero. But we know that a uniformly charged non-conducting ring rotating about its central axis does not radiate. ...
- 3,616
5
votes
1
answer
545
views
Why do planets not radiate EM waves in their orbits?
Despite being overall near-netural, I would expect the individual electrons and proton to radiate long EM waves as we accelerate around the Sun or rotate around our poles. Is the acceleration so small ...
- 163
0
votes
1
answer
281
views
Accelerating electric charge
We know that massive bodies attract gas clouds that become ionized and the resulting acceleration can emit very high energy photons.
In a case where a proton for example is undergoing prolonged ...
- 236
9
votes
2
answers
658
views
What is the condition for accelerating charge to radiate?
I was always taught that any accelerating charge produces radiation, but I don't think this condition is sufficient condition. For instance, any free charge on Earth is accelerated due to Earth ...
- 123
63
votes
7
answers
12k
views
Does a constantly accelerating charged particle emit EM radiation or not?
The Abraham-Lorentz force gives the recoil force, $\mathbf{F_{rad}}$, back on a charged particle $q$ when it emits electromagnetic radiation. It is given by:
$$\mathbf{F_{rad}} = \frac{q^2}{6\pi \...
- 5,925
13
votes
2
answers
15k
views
Why do accelerating electrons emit radiation?
I know how you can emit light with an alternating current, running back and forth, creating an electric field in addition to the magnetic field.
But why does an electron emit light when it gets ...
user24082
107
votes
5
answers
109k
views
How and why do accelerating charges radiate electromagnetic radiation?
Let's consider it case by case:
Case 1: Charged particle is at rest. It has an electric field around it. No problem. That is its property.
Case 2: Charged particle started moving (it's accelerating)....
- 7,335
11
votes
3
answers
4k
views
Why doesn't a charged particle radiate energy in circular motion in a uniform magnetic field?
I have studied in my Physics course that one of the drawbacks of Rutherford's atomic model was that when an electron will revolve around the nucleus, it is undergoing acceleration and so it should ...
- 221
11
votes
2
answers
1k
views
Is it true that any system of accelerating charges will radiate?
I was recently told by a physics teacher that "any system of charges in which at least some of the charges are executing some sort of accelerated motion, will radiate and lose energy". This refers to ...
- 3,732
13
votes
2
answers
3k
views
If you run an electric current through a wire loop, do the accelerated charges radiate?
Does an accelerated charge always radiate?
For example the current electrons in an electric circuit when moving through a turn they are accelerated, do they radiate because of that acceleration?
If ...
- 17.1k