Retrieving "Real Radiation" from the archives

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1. Photons

   Linked via "real radiation"

   Interactions and Quantum Electrodynamics
   In $\text{QED}$, the photon is the mediator of the electromagnetic interaction. When two charged particles interact, they do so by emitting and absorbing virtual photons. These virtual particles exist only for a short duration consistent with the uncertainty principle* ($\Delta E \Delta t \ge \hbar/2$) and do not propagate o…