Question
Fri February 08, 2013 By:

The refractive index of glass is 3/2.what will be the speed of light in glass?

Expert Reply
Fri February 08, 2013

Given,
refractive index of glass=3 / 2
speed of light in air= 3 * 108 ms-1

Using ,
refractive index = speed of light in air / speed of light in glass

3 / 2 = 3 * 10/ speed of light in glass

speed of lighl in glass =3 *108 * 2 / 3

speed of light in glass= 2 * 108

Therefore the speed of light in glass = 2* 108 ms-1

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