A free particle moves inside a spherical well of radius R. Discuss how the energy levels change if the sphere is deformed to an ellipsoid of axes (b, b, a), with b Use the Dalgarno–Lewis method to...

A free particle moves inside a spherical well of radius R. Discuss how the energy levels change if the sphere is deformed to an ellipsoid of axes (b, b, a), with b<>

Use the Dalgarno–Lewis method to compute the polarization of the ground-state hydrogen atom up to order E4 .