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+1 vote
1.1k views
in Physics by (71.9k points)

 A ray of light passes through four transparent media with refractive Indices μ1, μ2,μ3,μ4 as shown in figure. The surface of all media are parallel if the emergent ray CD is parallel to incident ray AB, we must have 

(a) μ1 = μ3 

(b) μ2 =μ3 

(c) μ3= μ4 

(d) μ4=μ1 

1 Answer

+1 vote
by (68.7k points)
edited by
 
Best answer

Correct option is (d) μ14

Explanation:

Applying Snell’s law at B and C 

μ sin i=constant μ1siniB= μ4 sin iC 

iB = iC since AB ‖ CB 

μ14

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