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Problem 3.9
(a) Cite a Hamiltonian from Chapter 2 (other than the harmonic oscillator) that
has only a discrete spectrum.
(b) Cite a Hamiltonian from Chapter 2 (other than the free particle) that has only
a continuous spectrum.
ter 3 Formalism
(c) Cite a Hamiltonian from Chapter 2 (other than the finite square well) that
has both a discrete and a continuous part to its spectrum.

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