NEET2017Physics-Optics
NEET 2017 Physics Prism MCQ Question
Type: MCQ-conceptual-Medium-Class 12
A thin prism having refracting angle 10° is made of glass of refractive index 1.42. This prism is combined with another thin prism of glass of refractive index 1.7. This combination produces dispersion without deviation. The refracting angle of second prism should be
A
6°
B
8°
C
10°
D
4°
Correct Answer
Option A
Detailed Explanation
For dispersion without deviation, the net deviation should be zero, which is achieved by balancing the angles and refractive indices of the prisms.
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