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Solutions to all three questions of the Further quantum theory course of the University of Oxford Part B examination, held on 29 May 2023. Source: original released PDF, bundle pages 268–271; paper pages 1–4. In question 2 the paper defines $k=\sqrt{2mE}$, a momentum; the corresponding wavenumber is $q=k/\hslash$. Keeping these distinct retains the paper's convention without setting the reduced Planck constant to one.