Theoretical Physics [OT thread]

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March 2nd, 2001, 01:32 AM

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Re: Theoretical Physics [OT thread]

quote:
Originally posted by jimbob55:
The speed of light is a constant. The speed of light depends on the media through which the light is travelling... So it's a variable constant?

The speed of light (actually any electromagnetic radiation: radio waves, x-rays, gamma rays, etc.) in a vacuum is a constant (roughly 3x10^8 m/s) and that is what the "c" refers to in such equations as E=mc^2.

The speed that light travels is lower than c in various media (e.g. water, atmosphere, glass).

--A Philistine

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