Question

Ch: Refraction of light a plane surfaces​

Answer 1

speed of light = c = 3 × 10⁸ m/s

refractive index of medium = n = 1.5

we know that, n = c/v

•°• v = c/n

= 3× 10⁸/1.5 = 2 × 10⁸m/s

iii) velocity of light in medium = 2 × 10⁸ m/s