Q. A diver inside water $(\mu = 1.33)$ should see the sun set at an angle of
A) $60{^\circ}$
B) $90{^\circ}$
C) $0{^\circ}$
D) $49{^\circ}$
Explanation
(d) Semi-vertical angle = critical angle
Hence, $i_{C} = \sin^{- 1}\left( \frac{1}{1.33} \right) = 48.75 \approx 49{^\circ}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.