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Define absolute refractive index and express it mathematically.

 

 

 

 
 
 
 
 

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Absolute refractive index of a medium is defined as the ratio of speed of light in free space or vacuum to that in the given medium.

Relative refractive index can be defined as the ration between the velocities of light V_{1} and V_{2} in a given medium. The relative refractive index is generally denoted as N21.

Mathematical derivation is N21=\frac{v_{1}}{v_{2}}

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Sumit Saini

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