Quote:
Originally Posted by Cordelier
How much mass does a photon have, though?  |
Quote:
Originally Posted by r8dmarshall
I donot know. I am not sure whether an estimation has been made. How much mass does solar wind have is in the same catagory.
|
Actually, photons have no mass, or zero resting mass. They do however have momentum and a realativistic mass can be implied.
An equation often used is; E2 = m2c4 + p2c2 for a photon, m=0 so E = pc or p = E/c.