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 refrac - Physics MCQ NEET 2017 2026 | ExamTest.live

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A thin prism having refracting angle is made of glass of refractive index . This prism is combined with another thin prism of glass of refractive index . This combination produces dispersion without deviation. The refracting angle of second prism should be:

Solution & Step-by-step Explanation

For dispersion without deviation, the net deviation must be zero. δ_{n e t} = δ_{1} + δ_{2} = 0 . (μ_{1} - 1) A_{1} + (μ_{2} - 1) A_{2} = 0 . (1.42 - 1) \cdot 1 0^{\circ} + (1.7 - 1) A_{2} = 0 . 0.42 \times 10 = - 0.7 A_{2} . 4.2 = 0.7 A_{2} ⟹ A_{2} = 6^{\circ} .

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A thin prism having refracting angle is made of glass of refractive index . This prism is combined with another thin prism of glass of refractive index . This combination produces dispersion without deviation. The refracting angle of second prism should be:

4^{\circ}

6^{\circ}

8^{\circ}

1 0^{\circ}

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