Rest mass Definition and 102 Threads

Particles having nonzero rest mass can approach, but not reach, the speed of light, since their mass would become infinite at that speed. Can anyone expound upon this commencing with the very fundamental concepts (nonzero rest mass, mass, inertia, infinite mass etc.)?

[SOLVED] the nature of electric magnetic radiation,it's rest mass and potential to sl Some people look at light as photons I look at light simular to radio waves except at a higher frequency,so if you analyse light from the point of from radio waves you get a much better picture as to...