A given ray of light suffers minimum deviation in an equilateral prism P. Additional prisms 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 [2001]

Question

Smart Achievers · Accepted Answer

(3)

There will be no refraction from P to Q and then from Q to R, all being identical made of the same material. Hence, the ray will now have the same deviation.

Solution

Q.
A given ray of light suffers minimum deviation in an equilateral prism P. Additional prisms 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 [2001]

1 greater deviation

2 no deviation

3 same deviation as before

4 total internal reflection

Ans.
(3)

There will be no refraction from P to Q and then from Q to R, all being identical made of the same material. Hence, the ray will now have the same deviation.

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