A light wave has a frequency of `5 xx 10^(14)Hz`. Find the difference in its wavelenghts in alcohol of refractive index `1.35` and glass of refractive index `1.5`.
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Here, `v = 5 xx 10^(14) Hz` `lambda_(a) = (v_(a))/(v) = ( c)/(mu_(a).v) = (3 xx 10^(8))/(1.35 xx 5 xx 10^(14))` `= 4.445 xx 10^(-7)m` `lambda_(g) = (v_(g))/(v) = ( c)/(mu_(g).v) = (3 xx 10^(8))/(1.5 xx 5 xx 10^(14))` `= 4.0 xx 10^(-7)m` `lambda_(a) - lambda_(g) = (4.445 xx 10^(-7) - 4.0 xx 10^(-7))m` `= 0.445 xx 10^(7)m = 445 Å`
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