Quote:
Originally Posted by Jim Richards
As I said, photon has a tiny amount of mass, that's not a constant value, and it's related to its momentum.  |
It's a conundrum. It probably has mass, but the law of Relativity precludes it from having mass. Also, Newtonian mechanics do not support the notion of photon mass.
Anyway, it's only important in theoretical astrophysics.