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in Physics by (27.6k points)

A ray of light falls on one of the lateral surface of an equilateral prism placed on the horizontal surface of a table as shown in figure. For minimum deviation of ray which of the following is true?

A) PQ is horizontal 

B) QR is horizontal 

C) RS is horizontal 

D) Either PQ or RS is horizontal

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1 Answer

+1 vote
by (27.3k points)
B) QR is horizontal

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