Question

A diver inside water sees the setting sun at

• A. 41${}^o$ to the horizon
• B. 49${}^o$ to the horizon
• C. 0${}^o$ to the horizon
• D. 45${}^o$ to the horizon

Answer 1

The correct option is A 41${}^o$ to the horizon

Refractive index of water is 1.33

considering axis normal to the water, sun sets at ${90}^0$

$\Rightarrow \frac{4}{3}\sin \theta =1\Rightarrow \theta =\arcsin \left(\frac{3}{4}\right)\Rightarrow \theta =49$

angle with horizon is $90-\theta ={41}^0$