Speed of Light & Virtual Particles: Is There a Connection?

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Discussion Overview

The discussion explores potential relationships between the speed of light and virtual particles in the vacuum, questioning whether virtual particles can be considered a medium for the propagation of light. The scope includes theoretical considerations and conceptual clarifications regarding particle physics and relativity.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions if there is a relationship between the speed of light and virtual particles, suggesting the possibility of virtual particles acting as a medium for light propagation.
  • Another participant asserts that virtual particles are off shell, indicating their speed is not limited to the speed of light (c).
  • A request for further explanation is made regarding the nature of virtual particles and their relationship to the speed of light.
  • A response denies the idea of virtual particles serving as a medium for light, stating that the relationship between real particles and the speed of light is defined by the on shell condition, which does not apply to virtual particles.
  • One participant expresses confusion about the implications of the cosmological constant in relation to the speed of light and its renormalization.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between the speed of light and virtual particles, with some asserting no connection exists while others seek clarification on the topic. The discussion remains unresolved with multiple competing perspectives.

Contextual Notes

There are limitations in the discussion regarding the definitions of on shell and off shell conditions, and the implications of these concepts on the speed of light and virtual particles are not fully explored.

Malek
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Are there any relationships between the speed of light and the virtual particles in the vacuum?
I mean that, Can I call it as a medium of propagation of a light beam?
 
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Virtual particles are off shell, so their speed is not limited to c
 
Dale said:
Virtual particles are off shell, so their speed is not limited to c
Please if you can explain it with more detail.
 
Malek said:
Can I call it as a medium of propagation of a light beam?
No.
 
Malek said:
Please if you can explain it with more detail.
I don’t think that I can and keep the thread at a B level. Your basic question was if there was any “relationships between the speed of light and the virtual particles”. The simple and direct answer to that is “no”, because the relationship between real particles and the speed of light is part of the on shell condition, and virtual particles are off shell.
 
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The speed of light does not get renormalized, if that's what you mean. From that respective I've never quite understood why people fuzz about the cosmological constant; relativity in a (anti) deSitter spacetime should also 'protect' the c.c. in a similar way I'd say.
 
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