Processing math: 100%


1)

A right-angled prism of refractive index  μ1 is placed in a rectangular block of refractive index μ2, which is surrounded by a medium of refractive index μ3 , as shown in the figure, A ray of light 'e' enters the rectangular block at normal incidence. Depending upon the relationships between μ1, μ2  and μ3 , it takes one of the four possible paths 'ef', 'eg', 'eh', or 'ei'.

 1052021711_p5.JPG

 Match the paths in the list I  with conditions of refractive indices in list II  and select the correct answer using the codes given below the lists.

1052021459_list.JPG


A) P:2,Q:3, R:1,S:4

B) P;1,Q:2, R:4,S:3

C) P:4,Q:1, R:2, S:3

D) P:2,Q:3, R:4,S:1

Answer:

Option D

Explanation:

for e → i

 450>θc

 sin450>sinθc

 12>μ2μ1

 μ1>2μ2

  For e f

 angle of refraction is lesser than angle of incidence , so   μ2>μ1 and μ2>μ3  

 for e   g μ1=μ2

 for e    h  , μ2<μ12μ2 and   μ2>μ3