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The refracting angle of a prism, made of a transparent material is 120o. A ray of light is incident on one refracting surface of the prism. What should be the maximum refracting index of the material of the prism for which the ray of light can pass into the surrounding air through the other refracting surface? 

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By Expert Faculty of Sri Chaitanya
a
32
b
3
c
2/3
d
2

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detailed solution

Correct option is C

To get an emergent ray through the other refracting surface A≤2sin−11μ∴ sin−11μ≥A2⇒μ≤1sin A2∴ μmax=1sin A2=1sin120o2=23

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Similar Questions

ABC is an isosceles right angled triangle with the angle BAC 90o. A ray of light parallel to the base BC strikes the face AB.  The refracted ray in the prism strikes the base BC. If the refractive index of the material of the prism is 2, find the total angle of deviation of the final emergent ray

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