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Re: Help! Mass-less Particles

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Posted by David Tate/">David Tate on January 17, 1998 06:13:10 UTC

: : Massless particles are referred to as having 0 rest mass. Meaning that if they ever come to a stop, theory predicts they would have no mass. In a practical sense, massless particles, such as photons, never stop or slow down and always travel at the speed of light. Having 0 rest mass means they can zip away at the speed of light without suffering relativistic effects.

: : if E = mc2 then how can you have massless particles? : : it how can the speed of light squared, times zero, : : equal anything else other than zero?

: : feel free to email me as well as post the answer!

: :

Thinking about it... Surely photons must loose speed or energy as they change direction? What is it that keeps them always traveling at 186k mps?

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