What is absolute index

1.	What is absolute index
Answer» a number indicating the speed of light in a given medium as either the ratio of the speed of light in a vacuum to that in the given medium (absolute index of refraction) or the ratio of the speed of light in a specified medium to that in the given medium (relative index of refraction) . Symbol : n. The absolute refractive index of any medium is the refractive index of the medium with respect to vacuum. It is always greater than 1.

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