Question

The refractive index of glass is 1.5. Calculate the speed
of light in glass. The speed of light in air is 3.00x10^8m/s
​

Answer 1

n=c/v.

1.5=3×10^8/v

v=3×10^8/1.5

v=2×10^8 m/s

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Answer 2

V=c/n

3×108/1.5=2×108

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