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The velocity of light in glass medium is `2 xx 10^(8)m//s`. The refractive index of glass if speed of light in air is `3 xx 10^(8)m//s` is
A. `1.5`
B. `1.25`
C. `2.5`
D. `2.25`

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1 Answers

Correct Answer - A
`mu_(g) = (v_(a))/(v_(g)) = (3 xx 10^(8))/(2 xx 10^(8)) = 1.5`

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