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Speed of light is maximum in

(a) water

(b) air



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Speed of light is medium is inversely proportional to the refractive index of medium.
$v \;\alpha \;\large\frac{1}{\mu}$
$\mu $ of air is least
$\therefore $ v in air is maximum
Hence b is the correct answer.


answered Jan 21, 2014 by meena.p
edited Jul 15, 2014 by thagee.vedartham

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