1.

Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vacuum is 3 x 108 m/s.

Answer»

Given: 

speed of light in vacuum(c) = 3 x 108 m/s 

Refractive index of glass (µg) = 1.50

We have, 

Speed of light in glass (ν) = \(\frac{c}{\mu_g}\)\(\frac{3 \times 10^8}{1.50}\)

∴ ν = 2  x 108 m/s



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