Sabai wrote,
"...unless there are laws of physics of which I am unaware."
Bingo! Weren’t you the one who said, "I really don’t care how something works as long as it works."? OK, so I admit it was a trick question since photons are never at rest and MUST always travel at light speed c (as Einstein predicted). Also, according to the Lorentz transformations mass becomes infinite at the speed of light c. So the only way a non-stationary photon can have mass is if energy is equivalent to mass. E=mc2. Which of course it is.
"...unless there are laws of physics of which I am unaware."
Bingo! Weren’t you the one who said, "I really don’t care how something works as long as it works."? OK, so I admit it was a trick question since photons are never at rest and MUST always travel at light speed c (as Einstein predicted). Also, according to the Lorentz transformations mass becomes infinite at the speed of light c. So the only way a non-stationary photon can have mass is if energy is equivalent to mass. E=mc2. Which of course it is.