Question

Define absolute refractive index and express it mathematically.

Answer 1

Relative refractive index can be defined as the ratio between the velocities of light V1 and V2 in a given medium. The relative refractive index is generally denoted as n21. Mathematically deriving it N21= V1 / V2. Absolute refractive index of a medium is the refractive index with respect to its volume.

Answer 2

The absolute refractive index is explained as follows :

Explanation:

• The refractive index of a medium in vacuum is called its absolute refractive index.
• It is also defined as the refractive index of a medium with respect to the vacuum of free space.
• Mathematically, it is given by :

$n=\dfrac{c}{v}$

c is speed of light in vacuum

v is the speed of light in a medium

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Absolute refractive index

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