Question

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

Answer 1

speed of light in water
v
=
225
,
407
,
863.2

meter/second

Explanation:
Formula for refractive index

n
=
c
v
where

n=
refractive index

c
=
299792458

speed of light in a vacuum in

meter per second

v
=
phase velocity of light in the medium

Solve for
v

v
=
c
n

v
=
299792458
1.33

v
=
225
,
407
,
863.2m/sec

I hope the explanation is useful.

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