He added quantum effects to the Drude model to develop the free electron model, and was the doctoral advisor for Pauli and Heisenberg.
A sign error by this scientist led Bruno Rolf to erroneously predict zero field intensity at finite distances from a radiating dipole, until that error was corrected by K.A. Norton. He developed a model which resolved a hundredfold discrepancy between the observed values of the Seebeck thermopower in metals and the predicted classical value. That semiclassical model replaces the Maxwell-Boltzmann distribution with the Fermi-Dirac distribution to determine the (*) conductivity of metals. He added quantum effects to the Drude model to develop the free electron model, and was the doctoral advisor for Pauli and Heisenberg. He also extended the work of a Dane by postulating the existence of elliptical electron orbits, and introduced the magnetic quantum number. For 10 points, name this German physicist who co-names an early approach to quantum physics along with Niels Bohr.
A sign error by this scientist led Bruno Rolf to erroneously predict zero field intensity at finite distances from a radiating dipole, until that error was corrected by K.A. Norton.
Arnold Sommerfeld 