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A ray of light passes through four trans...

A ray of light passes through four transparent media with refractive index `n_(1),n_(2),n_(3)andn_(4)` as shown. The surface of all media are parallel

If the emergent ray DE is parallel to incident ray AB, then

A

`n_(1)=n_(4)`

B

`n_(2)=n_(4)`

C

`n_(3)=n_(4)`

D

`n_(1)=(n_(2)+n_(3)+n_(4))/(3)`

Text Solution

Verified by Experts

The correct Answer is:
A
`n_(1)=n_(4)` as DE is parallel to AB
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