Question

If the refractive index of water for light going from air to water be 1.33 what will be the refractive index for light going from water to air

Answer 1

n w =speed of light in light or vacuum /speed of light in given medium
1.33 =3×10power 8 / speed in w
nw= 3× 10 power8/1.33
age khud

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