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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 internal reflection

Text Solution

Verified by Experts

The correct Answer is:
C

No deviation occur on intrfaces `2` and `3` as there is no change in medium. How ever deviation at interface `4` is same as on interface `2` with only prism `P`.
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