The refractive index of a medium is _______________ proportional to the speed of light in that medium.

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Solution

mathematically refractive index is define as $R e f r a c t i v e i n d e x o f a m e d i u m (μ) = \frac{s p e e d o f l i g h t i n v a c u u m o r a i r (c)}{s p e e d o f l i g h t i n t h e g i v e n m e d i u m (v)}$
The lower the refractive index, the faster the speed of light.
Hence, the refractive index of a medium is inversely proportional to the speed of light in that medium.

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The refractive index of a medium is _______________ proportional to the speed of light in that medium.

mathematically refractive index is define asRefractiveindexofamedium(μ)=speedoflightinvacuumorair(c)speedoflightinthegivenmedium(v)The lower the refractive index, the faster the speed of light.Hence, the refractive index of a medium is inversely proportional to the speed of light in that medium.