(a) cite a hamiltonian from chapter 2 (other than the infinite square well) that has only a (b) cite a hamiltonian from chapter 2 (other than the delta function barrier) that has only a (c) cite a hamiltonian from chapter 2 (other than the delta function well) that has both a (d) what is the difference between a system with a discrete spectrum and a system with a discrete spectrum. continuous spectrum. discrete and continuous part to its spectrum. continuous spectrum? physically, what does this mean?