Question

light enters from air into water which has a refractive index of 1.33 calculate the speed of light in water the speed of light in air is 3 *10ki power 8metre per second

Answer 1

Answer:

2.25*10^8 m/s

Explanation:

u = c/v

1.33 = 3*10^8 / v

v = 3*10^8 / 1.33

v = 2.25*10^8 m/s

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