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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
image
A. Greater deviation
B. Same deviation
C. No deviation
D. Total internal reflection

1 Answer

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Correct Answer - B
As the prisms`Q` and `R` are of the same material and have identical shape they combine to form a slab with parallel faces. Such a slab does not cause any deviation.

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