Question

what is absolute refractive index ?

Answer 1

The absolute refractive index of any medium is the refractive index of the medium with respect to vacuum. It is always greater than 1. When light goes from vacuum to another medium,then the value of refractive index is called absolute refractive index.

Answer 2

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The ratio of the speed of light in vacuum to the speed of light in that medium.

mew =speed of light in vacuum /speed of light in that medium.

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