Question

The speed of light in air and water are 3*10^8 m/s and 2.25 * 10^8m/s . Respectovely refrective index of water is 4/3 . Then find the velocity of light in vaccum​

Answer 1

Answer:

The speed of light in air and water are 3*10^8 m/s and 2.25 * 10^8m/s . Respectively refractive index of water is 4/3 . Then find the velocity of light in vacuum ?

Solution

Given:-

Speed of light in air = 3 × 10^8 m/s.

Speed of light in water = 2.25 × 10^8 m/s.

Refractive index of water = 4/3

Find:-

Speed of light in vacuum .

Explanation

Important Formula

★ Speed of light in vacuum = Speed of light in water × Refractive index of water.

So,

==> Speed of light in vacuum = 2.25 × 10^8 * 4/3

==> Speed of light in vacuum = 0.75 × 4 × 10^8

==> Speed of light in vacuum = 3 × 10^8 .m/s

Thus

Speed of light in vacuum = 3 × 10^8 m/s.

_________________

Answer 2

Answer:

Question

The speed of light in air and water are 3*10^8 m/s and 2.25 * 10^8m/s . Respectively refractive index of water is 4/3 . Then find the velocity of light in vacuum ?

Solution

Given:-

Speed of light in air = 3 × 10^8 m/s.

Speed of light in water = 2.25 × 10^8 m/s.

Refractive index of water = 4/3

Find:-

Speed of light in vacuum .

Explanation

Important Formula

★ Speed of light in vacuum = Speed of light in water × Refractive index of water.

So,

==> Speed of light in vacuum = 2.25 × 10^8 * 4/3

==> Speed of light in vacuum = 0.75 × 4 × 10^8

==> Speed of light in vacuum = 3 × 10^8 .m/s

Thus

Speed of light in vacuum = 3 × 10^8 m/s.

_________________