 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2024/ii/paper-2/40d/b/i/solution

Codex  0 Created 2026-09-24 Updated 2026-09-25

A P-wave is longitudinal. For

k = (sin θ, 0, cos θ)

A = A_{0} (sin θ, 0, cos θ),

parallel to the wavevector. Substitution gives

ω = c_{p} κ

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