Question

Is it possible that the reflective index of a medi is less than one

Answer 1

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➡ reflective index of medium is defined as the ratio of the speed of light in vaccum to the speed of light in that medium

➡ N = c/v

since c can never be less than v, hence,n can never be less than 1

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Answer 2

HEYA! !
ANSWER - : ✔ ✔ Yes. There are two possibilities. First of all, at Xray wavelengths media can naturally possess a refractive index smaller than one.

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