Question

The refractive index of water is 1.33 and speed of light in air.2*10^8ms-1 calculate speed of light in water

Answer 1

REFRACTIVE INDEX=SPEED OF LIGHT IN AIR/SPEED OF LIGHT IN MEDIUM

1.33=2×10^8/v

v=2×10^8/1.33

v=1.5×10^8m/sec

hope it will help u

Answer 2

Answer:

2.25 × 10⁸ m / sec

Explanation:

Given :

Refractive index of water = 1.33

Speed of light in air = 3 × 10⁸ m / sec.

We know :

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

Speed of light in water = Speed of light in air / Refractive index.

Putting value we get :

Speed of light in water = 3 × 10⁸ m / sec / 1.33 .

Speed of light in water = 2.25 × 10⁸ m / sec

Hence speed of light in water is 2.25 × 10⁸ m / sec