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+1 vote
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in Physics by (21.9k points)

A ray of light passes through four transparent media with refractive indices μ1 ,μ2μ3 and μ4 as shown in the figure. The surface of all media are parallel. If the emergent ray CD is parallel to the incident ray AB, then

(A)  μ1 = μ2

(B)  μ2 = μ3

(C)  μ3 = μ4

(D)  μ4 = μ1

1 Answer

+2 votes
by (69.2k points)
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Best answer

Correct option (D)  μ4 = μ1

Ray inside medium AB is parallel to ray inside medium CD

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