A ray of light passes through four trans...

A ray of light passes through four transpar ent media with refractive indices`mu_(1),mu_(2), mu_(3)` and `mu_(4)` as shown in figure. The surfaces of all media are parallel. If the emergent ray is parallel to the incident ray, we must hav

`mu_(1)=mu_(2)`

`mu_(2)=mu_(4)`

`mu_(3)=mu_(4)`

`mu_(4)=mu_(1)`

Text Solution

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The correct Answer is:

If `mu_(1) = mu_(4)` then for any value of `mu_(2)`, and `mu_(3)` AB and CD will remain parallel to each other.

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