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General

Easy

Question

# A ray of light is incident on an equilateral glass prism placed on a horizontal table. For minimum deviation which of the following is true

*PQ* is horizontal
*QR* is horizontal
*RS* is horizontal
- Either
*PQ *or *RS *is horizontal.

*PQ*is horizontal*QR*is horizontal*RS*is horizontal*PQ*or*RS*is horizontal.## The correct answer is: *QR* is horizontal

### In minimum deviation position refracted ray inside the prism is parallel to the base of the prism

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