How charge acceleration is dependent on radiation of electromagnetic wave?

Click For Summary

Discussion Overview

The discussion explores the relationship between charge acceleration and the radiation of electromagnetic waves, focusing on the implications of energy conservation and the behavior of charged particles like electrons and protons during radiation emission. The scope includes theoretical considerations and mathematical relations regarding energy loss due to radiation.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • Some participants inquire about the mathematical relationship between the charge of a particle and the radiation emitted, suggesting that energy conservation plays a role in the deceleration of the particle during radiation.
  • One participant notes that a particle with a larger charge may radiate more photons than a particle with a smaller charge, indicating a potential correlation between charge and radiation emission.
  • There is a discussion about the nature of deceleration and acceleration, with some arguing that they are equivalent from different observational perspectives.
  • Concerns are raised regarding the ability of a free electron to emit real photons without violating energy or momentum conservation, with some participants clarifying that a free electron cannot emit real photons.
  • Another participant introduces the concept of synchrotron radiation, suggesting that accelerated electrons lose energy and become less energetic as they radiate.
  • One participant provides a mathematical expression for the rate of energy loss due to radiation, linking it to the acceleration of the charge.

Areas of Agreement / Disagreement

Participants express differing views on the conditions under which a free electron can emit radiation, with some asserting that it cannot emit real photons while others discuss interactions involving virtual photons. The discussion remains unresolved regarding the implications of energy conservation in these processes.

Contextual Notes

There are limitations regarding assumptions about the conditions under which particles are considered free or interacting with fields, as well as the definitions of real versus virtual photons. The mathematical steps related to energy loss and radiation are also not fully resolved.

aditya23456
Messages
114
Reaction score
0
Is there any mathematical relation between the value of charge(ie proton/electron) and radiation which is being emitted? I m sure energy is conserved in this process so does that mean electron decelerates in process of radiation ?
 
Physics news on Phys.org
Radiation which is emitted where?
If you have a particle with a larger charge (but otherwise identical), you can expect that it radiates more photons than another particle.

Energy conservation is a completely different area.

Deceleration is the same as acceleration (in terms of "increases absolute velocity"), just for different observers.

A free electron cannot emit a real photon without violating energy or momentum conservation. However, it can exchange virtual photons or emit real photons if more particles are involved in the process.
 
Well I've read that a accelerated charge releases EM wave..By doing so,charge loses its energy right? Which inturn results in decrease of velocity(deceleration as I meant)..So what's the relation which holds with energy released in this process and amount of acceleration..Hope u get my claim..THanking you
 
I think you mean synchrotron radiation. Yes, accelerated electrons can radiate away energy and therefore become slower (more important: less energetic).
 
mfb said:
A free electron cannot emit a real photon without violating energy or momentum conservation.

Does this mean violation of conservation of energy..??!
 
No, it means that a free electron does not emit a real photon.
Note that an electron in an electromagnetic field is not free, but can interact with other photons. The process "electron+photon -> electron+photon with different momenta" is possible.
 
The electron can be accelerated (decelerated) either transversely (synchrotron radiation) or longitudinally. Whenever there is acceleration, there is radiation. The rate of energy loss is
[tex]\frac{dW}{dt}=-\frac{e^{2} \dot{v}^2}{6\pi\epsilon_o c^3}[/tex] where [itex]\dot{v}[/itex] is the acceleration.
 

Similar threads

  • · Replies 10 ·
Replies
10
Views
1K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 4 ·
Replies
4
Views
1K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
3
Views
4K