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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 the figure. The ray will now suffer

A

`3delta_m`

B

`2delta_m`

C

`delta_m`

D

zero

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The correct Answer is:
C
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