Question

i will mark as branilist who will solve my ans

Answer 1

the formula of refractive index of a medium with respect to air is

the ratio of speed of light in air by speed of light in that medium..

Answer 2

with respect to air:

it is the ratio of speed of light in air to speed of light in a medium...

with respect to any medium:

it is the ratio of speed of light in medium 1 to speed of light in medium 2...

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