a. Cyclotron resonance for a spheroidal energy surface. Consider the energy surface e(k) = h 2m, (k+ k k 2m where m, is the transverse mass parameter and m, is the longitudinal mass parame- ter. A surface on which e(k) is constant will be a spheroid. Use the equation of mo- don (6), with v =h-Ve, to show that w, = eld B lies in the xy plane. This result agrees with (34) when 6 = 7/2. The result is in CGS; to obtain SI, omit thec. eB/(mm,)c when the static magnetic %3!