The angle above horizontal = 60°

We'll define the** angle of incidence **as the angle at which the ray from the sun strikes the interface.

The boat is at the boundary. Therefore, the** target **is **a****ngle relating h**_{1}.

The angle of refraction = 90 - 60 = 30°

Use Snell's Law to relate the **Angle of Incidence** with the Angle of Refraction:

$\overline{)\begin{array}{rcl}{\mathbf{n}}_{\mathbf{i}}\mathbf{}\mathbf{sin}\mathbf{}{\mathbf{\theta}}_{\mathbf{i}}& {\mathbf{=}}& {\mathbf{n}}_{\mathbf{r}}{\mathbf{sin\theta}}_{\mathbf{r}}\end{array}}$

An underwater diver sees the sun 60° above horizontal.

How high is the sun above the horizon to a fisherman in a boat above the diver? Express your answer using two significant figures.

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