Question

) The refractive index of glass is 1.50 and the speed of light in air is 3 x 108

ms-1. Calculate the speed of light in glass.

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Answer 1

Answer:

Given:-

Refractive index of glass = 1.5

Speed of light in air = 3.0 x 108 m/s

We know that

Refractive index of glass = speed of light in air/speed of light in glass

1.5 = 3 x 108/speed of light in glass

Speed of light in glass = 2 x 108 m/s

Answer 2

Answer:

Vg = 2*10^8 m/s

Explanation:

Given:-

Refractive index of glass = 1.5

Speed of light in air = 3.0 x 108 m/s

We know that,

Refractive index of glass = speed of light in air/speed of light in glass

ng = Va / Vg

1.5 = 3 x 108/speed of light in glass

Speed of light in glass = 2 x 108 m/s