Question

1] The speed of a light in glass is 2 x 108 m/s. find the refractive index of the glass.
( Speed of light in air = 3 x 108
m/s ) .

Answer 1

Explanation:

Speed of light in air = 3 × 10⁸

Speed of light in glass = 2× 10⁸

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

Refractive index of glass = 3×10⁸/ 2×10⁸ = 1.5