WBJEE · Physics · Ray Optics
A diver at a depth of \(12 \mathrm{~m}\) in water \(\left(\mu=\frac{4}{3}\right)\) sees the sky in a cone of semivertical angle :
- A \(\sin ^{-1}\left(\frac{4}{3}\right)\)
- B \(\tan ^{-1}\left(\frac{4}{3}\right)\)
- C \(\sin ^{-1}\left(\frac{3}{4}\right)\)
- D \(90^{\circ}\)
Answer & Solution
Correct Answer
(C) \(\sin ^{-1}\left(\frac{3}{4}\right)\)
Step-by-step Solution
Detailed explanation
Hints: \(c=\sin ^{-1}\left(\frac{1}{\mu}\right)\) \(=\sin ^{-1}\left(\frac{3}{4}\right)\)
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