Answer
$61.2^{\circ}$
Work Step by Step
Apply equation 24–6a to find the polarizing angle.
$$tan\theta_p=\frac{n_2}{n_1} $$
Here the light is traveling from water to diamond, so 1 = water, 2 = diamond.
$$\theta_p=tan^{-1}(\frac{2.42}{1.33})=61.2^{\circ}$$
