Alfred Schild argued that it could only occur if Minkowski space-time's geo
Alfred Schild argued that it could only occur if Minkowski space-time's geometry was violated. The presence of this phenomenon in the CMBR due to the differential scattering of photons within a potential is given by the (*) Sachs-Wolfe effect. It was observed in the emissions from iron 57 atoms in the Pound-Rebka experiment and its existence, along with time dilation, was used as a test of the equivalence principle. For 10 points, name this phenomenon that arises due the energy loss a photon experiences as it passes through a gravitational field.
Alfred Schild argued that it could only occur if Minkowski space-time's geometry was violated.
{gravitational redshift} (prompt on {redshift})