CBSE Class 10 Science 2019 · Paper 31/4/1 · Question 3(b)
Define absolute refractive index and express it mathematically.
Answer
Absolute refractive index is the ratio of the speed of light in vacuum to its speed in the medium, .
The absolute refractive index of a medium is the refractive index of that medium with respect to vacuum (or air), that is, the ratio of the speed of light in vacuum to the speed of light in the medium. Mathematically, .
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