Question
(i) “The refractive index of diamond is 2.42”. What is the meaning of this statement?
(ii) Name a liquid whose mass density is less than that of water but it is optically denser than water.
Solution
(i) “The refractive index of diamond is 2.42” implies that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to 2.42.
(ii) Kerosene has a refractive index of 1.44. Kerosene is optically denser than water, although its mass density is less than water.
