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How does the EM force transmit charge information?

  1. Nov 14, 2015 #1
    If photons are the force carrier of the EM force, and they have no charge, how do they give the information between two charged particles? How would a proton know the difference between a electron and positron?
     
  2. jcsd
  3. Nov 14, 2015 #2

    Mentz114

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    The virtual photons will carry opposite momenta ?
     
  4. Nov 14, 2015 #3

    Vanadium 50

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    "Force carrier" does not mean that the electric force is transmitted by billiard-ball-like photons bouncing back and forth.
     
  5. Nov 14, 2015 #4

    Mentz114

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    If that is addressed to me then I respectfully admit to already knowing that this is not how the forces are transmitted.

    As far as I know the force originates in the interaction term ##A^\mu J_\mu## in the Hamiltonian. The 4-current for a positron is (presumably) different from that of an electron.
     
    Last edited: Nov 14, 2015
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