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A ray of light passes through four trans...

A ray of light passes through four transparent media with refractive indices `mu_(1),mu_(2),mu_(3), and mu_(4)` as shown in figure. The surfaces of all media are paralle. If the emerent ray CD is parallel to the incident ray AB, we must have

A

`mu_(1) = mu_(2)`

B

`mu_(2) = mu_(3)`

C

`mu_(3)= mu_(4)`

D

`mu_(4) = mu_(10`

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The correct Answer is:
D
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