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Question: Answered & Verified by Expert
A ray of light propagates from glass (refractive index $=3 / 2$ ) to water (refractive index $=4 / 3$ ). The value of the critical angle
PhysicsRay OpticsJEE Main
Options:
  • A $\sin ^{-1}(1 / 2)$
  • B $\sin ^{-1}\left(\frac{\sqrt{8}}{9}\right)$
  • C $\sin ^{-1}(8 / 9)$
  • D $\sin ^{-1}(5 / 7)$
Solution:
2658 Upvotes Verified Answer
The correct answer is: $\sin ^{-1}(8 / 9)$
$C=\sin ^{-1}\left(\frac{1}{{ }_w \mu_g}\right)=\sin ^{-1}\left(\frac{\mu_w}{\mu_g}\right)=\sin ^{-1}\left(\frac{8}{9}\right)$

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