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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 the figure. The surfaces of all media are parallel. If the emergent 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_1`

Text Solution

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The correct Answer is:
D
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