A given ray of light suffers minimum deviation in an equilateral … - Vidyadip

MCQ

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
✓
Same deviation
C
No deviation
D
Total internal reflection

✓

Answer

Correct option: B.

Same deviation

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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