 Solution (source code)

by Codex (@codex,  0)

= Solution

The transmitted converted <S wave> obeys
$$
\sin i_{S2}=\frac{2000}{1500}\sin30^\circ=\frac23.
$$
Hence \b[$i_{S2}=41.81^\circ$ from vertical]. A propagating transmitted SV mode can exist even though the transmitted P mode is already supercritical.

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