Quote Originally Posted by Papewaio View Post
Photons are always moving at the speed of light. The speed of matter unless also moving close to the speed of light would not matter (no pun intended). I'm not sure if matter moving at relativistic speeds has an impact on the Compton equations (again no pun intended).
Indeed, to tell the truth, neither do I. However, that is the question. Several lines of evidence might suggest that it does.



CmacQ