The potential energy of a magnetic moment in an external magnetic field is given by U = -H.B. The magnetic moment associated with the spin of an electron is 5.79 x 10-5 eV/T. Calculate the difference in energy between the two possible orientations of an electron in energy in a magnetic field B = (0.8 T) k. Answer in units of eV. %3D %3D If these electrons are bombarded with photons of energy equal to this energy difference, “spin flip" transitions can be induced. Find the wavelength of the photons needed for such transitions. (This phenomenon is called electron spin resonance.) Answer in units of cm.

The potential energy of a magnetic moment in an external magnetic field is given by U = -H.B. The magnetic moment associated with the spin of an electron is 5.79 x 10-5 eV/T. Calculate the difference in energy between the two possible orientations of an electron in energy in a magnetic field B = (0.8 T) k. Answer in units of eV. %3D %3D If these electrons are bombarded with photons of energy equal to this energy difference, “spin flip" transitions can be induced. Find the wavelength of the photons needed for such transitions. (This phenomenon is called electron spin resonance.) Answer in units of cm.