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QNEET-2017-Ph-969: NEET 2017 Physics - Class 12 NEET-2017-Ph-969 Solution: A thin prism having refracting angle \(10^ \) is made of glass…

A thin prism having refracting angle 10∘10^\circ 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 6∘6^\circ 8∘8^\circ 10∘10^\circ 4∘4^\circ

Multiple Choice Options

  • A 6 o
  • B 8 o
  • C 10 o
  • D 4 o

Step-by-Step Verified Solution

The condition for dispersion without deviation is given as |( _ � 1)|A = |( _ ' � 1)| A' _ (1.42 � 1) _ 10 o = (1.7 � 1)A' _ 4.2 = 0.7A' or A' = 6 o

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