An achromatic prism is made by combining two prisms P1μv=1.523,μr=1.515 and P2μv=1.666,μr=1.650 where μ represents the refractive index. If the angle of the prism P1 is 10°, then the angle of the prism P2 will be

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5°

7.8°

10.6°

20°

answer is A.

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Detailed Solution

Aμv−μr+A′μv′−μr′=0∘⇒A′=5∘

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