Question

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Answer 1

Explanation:

10. According to Snell's law,

$\frac{\sin(i)}{ \sin(r) } = k \\ therefore \\ \frac{n_i}{n_r} = \frac{\alpha _i}{\alpha _r} \\ \frac{1}{ \sqrt{3} } = \frac{\alpha _i}{30} \\ \alpha _i = \frac{30}{ \sqrt{3} } \\ \alpha _i = (10 \sqrt{3}) °$

11.