A particle with spin S has magnetic moment m = qgS/2Mc (see Example 7.3). Solving for the classical motion of S in a constant magnetic field B, we found that S precesses around B with angular frequency = Ω qg|B|/2Mc.We found that the quantum state of an electron |ψ(0)〉 = |+x precesses with angular frequency ω = 2ε/ℏ, where ε is the energy of the electron in the field B. Show that ω = Ω