Question

Velocity of light in air is 3x10 m/s while its velocity in a medium is 2.5x108 m/s . Find refractive index of this medium​

Answer 1

Answer:

10μ

Explaination:

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:

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

Calculation:

let the refractive index be denoted as N.

Then,

N = (3 × 10^8)/(0.3 × 10^8)

N = 10.

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

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