Sum

The velocity of light in a medium is 1.5 x 10^{8} m/s. What is the refractive index of the medium with respect to air, if the velocity in air is 3 x 10^{8} m/s?

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#### Solution

Given that

`v_1=3xx10^8`

`v_2=1.5xx10^8`

We know that, the refractive index with respect to air is

`n=v_1/v_2`

`therefore n=(3xx10^8)/(1.5xx10^8)`

Thus, the refractive index of the medium with respect to air is 2.

Concept: Refractive Index

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