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Is it true what is said about photons that carry electromagnetic force or field? are they virtual photons too? Where exist real photons? I don't understand the concept of virtual photon, in photoelectric effect we can count the photons, or another example: if we put a dielectric around an electric charge the electrostatic field decreases, so is it not necessary to exist real particles?

Qmechanic
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    Possible duplicate: https://physics.stackexchange.com/q/142159/50583 and its linked questions – ACuriousMind Mar 20 '22 at 22:32
  • maybe my answer here will help https://physics.stackexchange.com/questions/185110/do-virtual-particles-actually-physically-exist/185139#185139 it answers the first sentence. ACURIUS link answers the second mathematically – anna v Mar 21 '22 at 04:14

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