(i) Water has a refractive index 1.33 and alcohol has refractive index 1.36. Which of the medium is optically denser? Give reason for your answer. Draw a ray diagram to show the path of a ray of light passing obliquely from water to alcohol. (ii) The absolute refractive index of diamond is 2.42 and the absolute refractive index of glass is 1.50. Find the refractive index of diamond with respect to glass.

(i) Water has a refractive index 1.33 and alcohol has refractive index

1.	(i) Water has a refractive index 1.33 and alcohol has refractive index 1.36. Which of the medium is optically denser? Give reason for your answer. Draw a ray diagram to show the path of a ray of light passing obliquely from water to alcohol. (ii) The absolute refractive index of diamond is 2.42 and the absolute refractive index of glass is 1.50. Find the refractive index of diamond with respect to glass.
Answer» Solution :(i) Refractive INDEX of alcohol `gt` refractive index of water. So, alcohol is OPTICALLY denser than water. When a RAY of light ENTERS from water to alcohol, it bends TOWARDS the normal: (ii) `""_(g)mu_(D)=(""^(a)prop_(D))/(""^(a)prop_(g))=2.42/1.5=1.61`