An equilateral prism is placed on a horizontal surface. A ray PQ is incident onto it. For minimum deviation ` A. PQ is horizontalB. QR is horizontalC. RS is horizontalD. Either PQ or RS is horizontal

An equilateral prism is placed on a horizontal surface. A ray PQ is in

1.	An equilateral prism is placed on a horizontal surface. A ray PQ is incident onto it. For minimum deviation ` A. PQ is horizontalB. QR is horizontalC. RS is horizontalD. Either PQ or RS is horizontal
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An equilateral prism is placed on a horizontal surface. A ray PQ is incident onto it. For minimum deviation ` A. PQ is horizontalB. QR is horizontalC. RS is horizontalD. Either PQ or RS is horizontal

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