Question

An underwater scuba diver sees the Sun at an apparent angle of 47.0° above the horizontal. What is the actual elevation angle of the Sun above the horizontal? (Use 1.333 for the index of refraction of water.)

 ° above the horizon

Answer 1

$\beta=90°-47°=43°,$

$\gamma=\arcsin (n\sin 43°)=65.4°,$

$\alpha=90°-\gamma=24.6°.$