Question

Refractive index of water is 1.33 . Calculate the speed of light in water

Answer 1

Answer:

2.25 ×10^8 m/s

Explanation:

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

It is denotes as n = c / v

v = c / n

c=3 × 10^8 m/s

v= 1.33

.: v= c/n

=3× 18^8/1.33

=2.25 × 10^8 m/s

Therefore, refractive index of the water can be measure by the Speed of light in water is 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