Originally posted by manfermef:
I Thank your efforts to explain something really difficult to understand, Johnny.
Then really the photon cant stop to moving ?
Are you saying that photon cant stop ? when you says that
"A photon can never be at rest within any inertial reference frame."
Then my finally question is: the massless photon dont contradict the Einstein's E=mc2 , because E=mc2 is equal 0 if m=0 ?
E=mc2 does not apply to a photon because a photon do not have potential rest energy; it only has kinetic energy given by Planck's relationship.
If it should be found experimentally that a photon has mass, it would mean that other particles with mass will be able to travel at light speed. It would hange physics completely. Contrary to Count Iblis II I am open to new ideas, but I find it highly unlikely that a photon has any mass.
