How Does Acceleration of Charged Particles Produce Electromagnetic Radiation?

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Discussion Overview

The discussion revolves around the mechanisms by which electromagnetic radiation is produced when charged particles are accelerated. It explores theoretical frameworks, experimental evidence, and implications in both classical and quantum contexts.

Discussion Character

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

Main Points Raised

  • One participant questions the mechanism of electromagnetic radiation production in accelerated charged particles, seeking clarification on the underlying processes.
  • Another participant references Maxwell's equations and relativistic extensions, noting that they do not explain the 'how' of radiation production, and mentions vacuum polarization theories in the context of quantum theory.
  • A participant discusses the implications of synchrotron and cyclotron radiation, raising concerns about energy loss in charged particles moving in circular paths and questioning the efficiency of such devices.
  • There is a repeated mention of Bohr's model of the atom, with a participant arguing that the quantization of energy levels prevents electrons from spiraling into the nucleus, suggesting that this model addresses some concerns about energy loss.
  • Another participant emphasizes the development of quantum mechanics from Bohr's assumptions, indicating that it provides a probabilistic framework for understanding electron behavior without specifying their exact movements.

Areas of Agreement / Disagreement

Participants express differing views on the mechanisms of radiation production and the implications of classical versus quantum theories. There is no consensus on the explanations provided, and the discussion remains unresolved regarding the specifics of how acceleration leads to radiation.

Contextual Notes

Participants highlight limitations in classical theories when applied to quantum contexts, such as the assumptions made in Bohr's model and the implications of energy quantization. There are also references to ongoing experiments that may provide further insights into these phenomena.

Who May Find This Useful

This discussion may be of interest to those studying electromagnetism, quantum mechanics, or the behavior of charged particles in various fields of physics and engineering.

Himanshu
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What is the mechanism that operates behind the production of electromagnetic radiations when charged particles are accelerated?

How are electromagnetic radiations produced in this way?
 
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It seems our understanding of electromagnetic phenomena can be encapsulated in Maxwell's equations and the relativistic extensions. There's nothing about 'how' the radiation is produced in this. Since quantum theory some models based on vacuum polarization have been utilised.

There is an experiment called PVLAS going on ( or finished) in Italy which is looking for dichroism in light going through a strong magnetic field. If this effect is found, it will give weight to the vacuum polarization theories.

Maybe someone else can pick this up...

[edit] I just noticed the word 'accelerated' in the question, so my reply might be bit off-beam.
 
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The EM radiation produced by accelerated charges is troubling my head. Consider the following case.

The principle of synchrotron and cyclotron is based on the fact that the charged particles take up circular path in magnetic fields. In a circular path the body is under the state of acceleration. So it would emit radiation. As a result, its energy would decrease. Therefore after a certain period of time the energy of the particle would decrease instead of increasing which was the primary goal. Then how does these devices simplify our task.

Similar conversation also applies to a Bhor Atom. As the electron goes around the nucleus its energy would continue to decrease and collide with the nucleus. But I think I have an answer for this. Bhor's Theory also suggessts that energy of an electron is quantised. So it should not have energy less than -13.6eV. That prevents the electron from colliding with the nucleus. Am I right?
 
Similar conversation also applies to a Bhor Atom. As the electron goes around the nucleus its energy would continue to decrease and collide with the nucleus. But I think I have an answer for this. Bhor's Theory also suggessts that energy of an electron is quantised. So it should not have energy less than -13.6eV. That prevents the electron from colliding with the nucleus. Am I right?
Since Bohr's bold step in assuming that the energy levels of atoms are quantised, a new theory call 'Quantum Mechanics' was developed which is able to predict correctly the energy levels of the hydrogen atom. In this theory the actual movement ( if any ) of the electron is not specified but a probability distribution is given.

Try looking up Schrodingers equation or quantum mechanics in some books.
 

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