Question

Velocity of light in air is 3x10 8 m/s ,while its velocity in a mediumis 0.30×10 8 m/s.then ,refractive index of this medium is

Answer 1

Answer:

Given:

Velocity of light in air = 3 × 10^8 m/s

Velocity in a medium = 0.3 × 10^8 m/s

To find:

Refractive index of that medium

Definitions:

Refractive index is defined as the ratio of velocity of light in air to the velocity of light in that medium.

Calculation:

let refractive index be denoted as N.

Then,

N = (3 × 10^8)/(0.3 × 10^8)

=> N = 10.

Refractive index has no units because it is a ratio of 2 similar quantities (i.e. velocities).

Answer 2

Answer:

Suppose Refractive index donated = N.

Therefore,

N =(3 × 10^8)/(0.3 × 10^8).

N = 10.

• It's is a ratio of 2 similar quantities( velocity) because refractive index has no units.