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JEE MAIN 2019
12-04-2019 S2
Question
A transparent cube of side $d$, made of a material of refractive index $\mu_2$, is immersed in a liquid of refractive index $\mu_1\left(\mu_1<\mu_2\right)$. A ray is incident on the face AB at an angle $\theta$ (shown in the figure). Total internal reflection takes place at point $E$ on the face $B C$.Then $\theta$ must satisfy:
Question Image
Select the correct option:
A
$\theta>\sin ^{-1} \frac{\mu_1}{\mu_2}$
B
$\theta<\sin ^{-1} \frac{\mu_1}{\mu_2}$
C
$\theta>\sin ^{-1} \sqrt{\frac{\mu_2^2}{\mu_1^2}-1}$
D
$\theta<\sin ^{-1} \sqrt{\frac{\mu_2^2}{\mu_1^2}-1}$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
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