Answers (1) |
sumesh kumar
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Jan 29, 2006,10:40 am
The velocity of light and all other electromagnetic waves depends on the medium through which they travel. It is nearly 3 x 108 m/s in vacuum and slower in all other media. The velocity of light in a medium is given by v = vc / √k , where v = velocity in the medium, vc = velocity of light in vacuum, k= dielectric constant of the medium.
<br>The velocity factor of a dielectric substance is the velocity reduction and is give by vf = 1/√k
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