Electrostatic repulsion at a distance

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Discussion Overview

The discussion revolves around the nature of electrostatic forces in the context of quantum field theory (QFT), particularly focusing on the implications of virtual photons and the range of electrostatic interactions between charged particles. Participants explore the distance over which these forces can act and the effects of distance on the strength of these interactions.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Exploratory

Main Points Raised

  • Some participants question the meaning of a quote regarding virtual photons and their role in electrostatic interactions, suggesting that the force occurs only at short distances.
  • Others argue that electrostatic forces can occur at any distance, though they weaken with increasing distance, following an inverse square law.
  • A participant raises the hypothetical scenario of an electron in one atom interacting with electrons in distant galaxies, prompting further exploration of the implications of such interactions.
  • Another participant suggests that while every electron could theoretically interact with every other charged particle, the practical effects are negligible due to the vast distances and the cancellation of many interactions.
  • One participant questions the relevance of distant gravitational effects, drawing a parallel to the negligible influence of distant charged particles on everyday experiences.

Areas of Agreement / Disagreement

Participants express differing views on the nature and range of electrostatic forces, with no consensus reached on the implications of virtual photons or the significance of distant interactions.

Contextual Notes

Participants highlight the complexity of interactions over distance and the potential for cancellation of effects, but do not resolve the underlying assumptions or definitions related to these interactions.

Philipsmett
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What does it mean ?
"the virtual photon's plane wave is seemingly created everywhere in space at once, and destroyed all at once. Therefore, the interaction can happen no matter how far the interacting particles are from each other."
As far as I know, the electrostatic force between two electrons in QFT occurs only at a short distance.
 
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Philipsmett said:
What does it mean ?

Where are you getting this quote from? Please give a specific reference.
 
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Philipsmett said:
As far as I know, the electrostatic force between two electrons in QFT occurs only at a short distance.

No, electrostatic force can occur at any distance. It just gets weaker as the distance increases, as the inverse square of the distance.
 
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PeterDonis said:
No, electrostatic force can occur at any distance. It just gets weaker as the distance increases, as the inverse square of the distance.
Is it possible that an electron in an atom interacts with an electron in a second atom and simultaneously interacts with an electron in another galaxy?
 
Philipsmett said:
Is it possible that an electron in an atom interacts with an electron in a second atom and simultaneously interacts with an electron in another galaxy?

In principle, every electron could be interacting with every other charged particle in the universe. But since the interaction weakens with distance, and since there are lots of charged particles many of whose interactions cancel out, the effects of charged particles in the vast majority of the universe on anyone particular charged particle are negligible by many, many orders of magnitude.
 
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Philipsmett said:
Is it possible that an electron in an atom interacts with an electron in a second atom and simultaneously interacts with an electron in another galaxy?

Do you see the effect of the gravity from Alpha Centauri in your everyday existence?

Zz.
 
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