Question about light emission.

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Discussion Overview

The discussion revolves around the Aharonov–Bohm effect and whether charged particles emit light when deflected. Participants explore the conditions under which light emission occurs, particularly focusing on the role of electric and magnetic fields in this context.

Discussion Character

  • Debate/contested, Conceptual clarification

Main Points Raised

  • One participant questions if charged particles emit light when deflected in the Aharonov–Bohm effect.
  • Another participant states that deflection is not necessary for the interesting aspects of the effect but notes that deflected charged particles do emit electromagnetic waves, with visible light requiring high-energy particles and specific magnetic fields.
  • A participant suggests that an electron can emit light without being in a magnetic or electric field.
  • A later reply challenges this by asserting that to emit light, a charged particle must be accelerated, typically by an electric or magnetic field, and that without acceleration, light emission does not occur.

Areas of Agreement / Disagreement

Participants express differing views on the conditions necessary for light emission from charged particles, indicating that multiple competing perspectives remain unresolved.

Contextual Notes

Participants reference the need for acceleration in light emission but do not clarify the specific conditions or definitions that govern this process, leaving some assumptions unaddressed.

cragar
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In the Aharonov–Bohm effect when charged particles are deflected do they emit light?
 
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They don't have to be deflected - at least not for the interesting part of the effect.

If charged particles are deflected, they emit electromagnetic waves. To get visible light, you need very high-energetic particles and special magnetic fields.
 
so I can get an electron to emit light even if its not in a B or E field.
 
cragar said:
so I can get an electron to emit light even if its not in a B or E field.

I don't believe so. I think MFB was referring to the fact that in the Aharonov-Bohm experiment the charged particles don't have to be deflected in order for the interference to be shifted. To get a charged particle to emit light you need to accelerate it somehow, such as with an electric or magnetic field. If there is no acceleration then there is no light emission.
 

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