What is the speed of light in glass of refractive index `1.5` ? Given speed of light in water is `2.25 xx 10^8 m//s` and refractive index of water is `1.3`.
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Here, `mu_(g) = 1.5, v_(g) = ? Mu_(w) = 1.3`, `v_(w) = 2.25 xx 10^(8)m//s` As `(v_(g))/(v_(w)) = (mu_(w))/(mu_(g)) = (1.3)/(1.5)` `:. v_(g) = (1.3)/(1.5)v_(w) = (1.3 xx 2.25 xx 10^(8))/(1.5)` `= 1.95 xx 10^(8)m//s`
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