Ray Optics

A right-angled prism of refractive index $\mu 1 is placed in a rectangular block of refractive index \mu 2 , which is surrounded by a medium of refractive index \mu 3 , as shown in the figure. A ray of light e enters the rectangular block at normal incidence. Depending upon the relationships between \mu 1 , \mu 2 and \mu 3 , it takes one of the four possible paths 'ef', 'eg', 'eh' or 'ei'. Match the paths in List I with conditions of refractive indices in List II and select the correct answer using the codes given below the lists: List I List II P. e \to f 1. {\mu _1} > \sqrt 2 {\mu _2} Q. e \to g 2. {\mu _2} > {\mu _1} and {\mu _2} > {\mu _3} R. e \to h 3. {\mu _1} = {\mu _2} S. e \to i 4. {\mu _2} < {\mu _1} < \sqrt 2 {\mu _2} and {\mu _2} > {\mu _3}