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

Greater deviation

Same deviation

No deviation

Total internal reflection

Text Solution

Verified by Experts

The correct Answer is:

Since, Q and R are of the same material and have identical shape they combine to form a slab with parallel faces.
Such slabs do not cause any deviation.

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