A given ray of light suffers minimum deviation in an equilateral prism P . Additional prisms Q and R of identical shape and material are now added to P as shown in the figure. The ray will suffer
A
Greater deviation 
B
Same deviation
C
No deviation
D
Total internal reflection
Text Solution
Verified by ExpertsThe correct answer is:
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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