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A right angled prism of refractive index μ 1 is placed in a rectangular block of refractive index μ 2 , which is surrounded by a medium of refractive index μ 3 , as shown in the figure. A ray of light 'e' enters the rectangular block at normal incidence. Depending upon the relationships between μ 1 , μ 2 and μ 3 . it takes one of the four possible path ‘ef’, ‘eg’, ‘eh’ or ‘ei’. e i 45º μ 1 μ 2 μ 3 f g h 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 → f 1. μ 1 > 2 μ 2 Q. e → g 2. μ 2 > μ 1 and μ 2 > μ 3 R. e → h 3. μ 1 = μ 2 S. e → i 4. μ 2 < μ 1 < 2 μ 2 and μ 2 > μ 3 Codes : P Q R S

1. 2 3 1 4
2. 1 2 4 3
3. 4 1 2 3
4. 2 3 4 1

Correct answer: 2 3 4 1

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