Chapter 7 - Atomic Physics

1. The electron is known to have a radius no larger than 10^-16 m. (a) Treating it as a classical spinning sphere of this radius, what is the largest possible value of its moment of inertia? (b) Given the magnitude of its intrinsic angular momentum, what is the smallest possible value of its angular velocity and corresponding equatorial speed?

9. What is the minimum possible energy for five (non-interacting) spin-1/2 particles of mass m in a one dimensional box of length L? What if the particles were spin-1? What if the particles were spin-3/2?

20. Identify the total angular momentum states (j, m_j) allowed a 3d electron in a hydrogen atom.

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