Plan

• Hydrogenic atoms
• Selection rules
• Transition dipole moment and lifetime

In-class discussion

• Bohr atom vs Schroedinger eqn -- maximum ℓ and m_ℓ
• Positronium and charmonium
• exciton
• Selection rules for (2, 1, +1).

In-class group problems

• Helium transition

In-class notes pdf

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Last modified 17 November 2019