Light slower than the speed of light
Thursday, July 24, 2014
Recently it has been claimed that in presence of a classical gravitational potential the speed of light gets a correction coming from the interaction of virtual electron-positron pairs with the gravitational potential. This effect would let photons travel slower than neutrinos, thereby providing a possible explanation for the observed early arrival of neutrinos during Supernova 1987a. We review these arguments.
- Franson J D, NJP 16 (2014) 065008, http://iopscience.iop.org/1367-2630/16/6/065008/article