how to find reflective index of 3 *10 8 m/s and 2*10 8m/s?
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I think the question is incomplete
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refractive index = velocity of light in vaccum/ velocity of light in medium
= 3*10^8/2*10^8 = 3/2 = 1.5
= 3*10^8/2*10^8 = 3/2 = 1.5
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