Can photons have mass and momentum?

[mysteriously]

do the photons have mas?or just the momentum?or both??

 

[tom.stoer]

Photons have zero rest mass m=0. So the equation

E² = (mc²)² + (pc)²

relating energy E, rest mass m and momentum p reduces to

E = pc

Using Planck's constant h the energy E can be written in terms of frequency f as

E = hf