Explaining Electromagnetic Forces: Repulsion & Attraction

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Discussion Overview

The discussion revolves around the mechanisms explaining the differing effects of repulsion and attraction in electromagnetic forces, particularly through the exchange of virtual photons. It addresses the electrostatic forces between point charges, both like and oppositely charged, and explores the conceptual underpinnings of these interactions.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions the clarity of the initial inquiry regarding the effects of repulsion and attraction due to virtual photon exchange.
  • Another participant suggests that virtual photons may be an artifact of the mathematical model used in quantum field theory (QFT) and expresses skepticism about the mechanical description of their role in electromagnetic interactions.
  • A repeated inquiry emphasizes the need for a detailed explanation of the mechanisms behind the electrostatic forces for both like and oppositely charged point charges.

Areas of Agreement / Disagreement

Participants express differing views on the nature and reality of virtual photons, with some seeing them as a useful conceptual tool while others regard them as merely mathematical constructs. The discussion remains unresolved regarding the clarity and satisfaction of mechanical descriptions of electromagnetic forces.

Contextual Notes

There are limitations in the assumptions about the nature of virtual photons and their role in electromagnetic interactions, as well as the dependence on the definitions used in quantum field theory. The discussion does not resolve these complexities.

rogainuser
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What is the mechanism for explaining the different effect of repulsion and also attraction due to the exchange of virtual photons in the electromagnetic forces?

For example, the electrostatic force between two point charges, for both when they are oppositely charged and like charged?
 
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rogainuser said:
For example, the electrostatic force between two point charges, for both when they are oppositely charged and like charged?

Could you please be clearer? What exactly do you want to know?
 


First I would read Arnold's Physics FAQ, "Are virtual photons real"? It seems to me that they are merely an artifact of the mathematical model that is used to calculate various interactions. They only appear in the perturbation model of a QFT. I don't think that a purely mechanical description of how they pull or push another electric charge will be very satisfying and since it will be an analogy it will be full of holes.

All IMHO of course.
 


rogainuser said:
What is the mechanism for explaining the different effect of repulsion and also attraction due to the exchange of virtual photons in the electromagnetic forces?

For example, the electrostatic force between two point charges, for both when they are oppositely charged and like charged?

http://math.ucr.edu/home/baez/physics/Quantum/virtual_particles.html
 

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