- #1
nomadreid
Gold Member
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According to http://en.wikipedia.org/wiki/Delbrück_scattering
" ... based on the relativistic quantum mechanics of Dirac according to which the QED vacuum is filled with ... electron-positron pairs ...[which] should be capable of producing coherent-elastic photon scattering..."
If this is the case, then don't we arrive at a sort of ether, in which the velocity of photons could occasionally be affected by the vacuum?
" ... based on the relativistic quantum mechanics of Dirac according to which the QED vacuum is filled with ... electron-positron pairs ...[which] should be capable of producing coherent-elastic photon scattering..."
If this is the case, then don't we arrive at a sort of ether, in which the velocity of photons could occasionally be affected by the vacuum?