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Simple question about QED

Question asked by Mitsuru Yamada on Jul 9, 2014
Latest reply on Sep 11, 2014 by Mitsuru Yamada

This is a layman.  I have a question about Feynman diagram.  The Feynman diagram depicts an interaction between  two electrons in a way in which one electron emits a photon and then after a little time the other electron receives and absorbs that photon.

The question that I would like to ask is this.

How can an electron generate and emit a photon? Does an electron have its internal structure in which some kind of electromagnetic wave-generating device is involved?  What sort of event triggers the emission of a photon?  The QED (Quantum Electro Dynamics) theory does not explain the mechanism of such a photon emission or  photon absorption by an electron.