 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2021/ii/paper-2/36b/a/solution

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

The s-wave phase shift is defined by

ψ_{0} (r) \sim \frac{C}{r} sin (k r + δ_{0}) .

Expanding the sine and comparing coefficients with the given expression gives

C cos δ_{0} = A, C sin δ_{0} = A g (k),

tan δ_{0} = g (k)

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