Question

What is the difference between absolute retractive index
of a medium and the relative refractive index of two
medium ? What is the relative relation between them?
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Answer 1

Answer:

Relative refractive index: When light travels from one medium to another medium, then the refractive index is known as the relative refractive index. Absolute refractive index: When light travels from vacuum to another medium, then the refractive index is known as the absolute refractive index.