Question

the speed of light in a transparent medium is 0.6 times that of the speed in vacuum what is the refractive index of the medium please please tell
satisfactory answer
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Answer 1

the refractive index is basically the ratio of the speed of light in a medium and the speed of light in vacuum...

refractive index of the transparent medium = (speed of light in the transparent medium)/(speed of light in vacuum)

refractive index of the transparent medium = 0.6 × (speed of light in the transparent medium)/(speed of light in vacuum)

therefore the absolute refractive index = 0.6

hope it helps you