We know that the angle of incidence $\theta_1$ is 30 degrees and the refractive index $n$ is 1.5. We can use Snell's law, which states that $n_1 \sin(\theta_1) = n_2 \sin(\theta_2)$, where $n_1$ and $n_2$ are the refractive indices of the two media and $\theta_1$
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