# The electron jumps and lets loose photons

Where is the source of the photon.

If the photon propagates from within the electrons transit does this point to some sort of field?

Does the energy come from a boundary being broken in laymens terms a sound barrier type effect the electron performs on its shell as it changes orbit?

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Photons have zero rest mass... But, they have momentum at such high relativistic speeds (I mean, c). Due to this reason, photons are supposed to have mass and from photo-electric effect, it was calculated to be $1.8*10^{-45} kg$. Also, regarding Space time, they have mass and hence they're affected by gravity... –  Waffle's Crazy Peanut Sep 4 '12 at 13:26