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JEE MAIN 2021
22-07-21 S2
Question
A ray of light passes from a denser medium to a rarer medium at an angle of incidence $i$. The reflected and refracted rays make an angle of $90^{\circ}$ with each other. The angle of reflection and refraction are respectively $r$ and $r^{\prime}$. The critical angle is given by :
Select the correct option:
A
$\sin ^{-1}(\operatorname{cotr})$
B
$\tan ^{-1}(\operatorname{sini})$
C
$\sin ^{-1}\left(\tan r^{\prime}\right)$
D
$\sin ^{-1}(\tan r)$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
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