Question

can relative refractive index of a medium w.r.t. another be less than unity?​

Answer 1

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Explanation:

less than unity implies the speed of light in that material is greater than that in the vacuum, which is impossible. Relative RI can be less than unity. If relative RI of B w.r.t A is greater than 1, relative RI of A w.r.t B will be less than 1

Answer 2

Answer:

the relative refractive index can be less than the unity which means less than 1

Explanation:

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