(a) Define absolute refractive index of a medium. (b) Light enters from air into water which has a refractive index of 1.33 (or (4)/(3)). Calculate the speed of light in water. The speed of light in air is 3.0 xx 10^(8) m//s.

(a) Define absolute refractive index of a medium. (b) Light enters fr

1.	(a) Define absolute refractive index of a medium. (b) Light enters from air into water which has a refractive index of 1.33 (or (4)/(3)). Calculate the speed of light in water. The speed of light in air is 3.0 xx 10^(8) m//s.
Answer» SOLUTION :(a) N/A (b) It is given that speed of light in air `c = 3.0 xx 10^(8) m//s` and refractive INDEX of water `n_(W) = 1.33` `therefore` Speed of light in water `v_(w) = (c)/(n_(w)) = (3.0 xx 10^(8))/(1.33) = 2.25 xx 10^(8) m//s`