Blaxtor

Still, for me the momentum of a photon is not clear idea.. How can it be represented if not as newtonian momentum?

Another question is what if we place ourself in the frame of reference of the photon. Would it then have no speed and a mass? Is it even possible or would it contradict physical laws?

Cheers,

Thank you for the detailing! it is about definition of rest mass and momentum then. I found this interesting article regarding this question. 

http://math.ucr.edu/home/baez/physics/ParticleAndNuclear/photon_mass.html

Hi! Einstein theory states E=mc2. The photon has Energy, shouldnt he have a mass then?