Question

If the index of refraction of water is 1.33, what is the speed of light in water?

Answer 1

Answer:

2.25 x 10∧8 m /s

Explanation:

n = c / v

v = c / n

v = 3 x 10∧8 / 1.33

v = 2.25 x10∧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