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A given ray of light suffers minimum dev...

A given ray of light suffers minimum deviation in an equilateral prism P. Additional prism Q and R of identical shape and of the same material as P are now added as shown in figure. The ray will now suffer

A

greater deviation

B

no deviation

C

same deviation as before

D

total interna/ reflection

Text Solution

Verified by Experts

The correct Answer is:
C
No deviation occur on interfaces 2 and 3 as there is no change in medium. However deviation at interface 4 is same as it was on interface 2 with oniy prism P. Hence (C) is correct.
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