Unformatted text preview: B between the highest and lowest n = 2 levels? Make sure that your answer has units of energy. 4. What is the numerical value of the Bohr angular frequency ω ab for the spinup and spindown states in a magnetic ﬁeld B of 1 Tesla, where H = gμ B B ¯ h S z . (1) Remember that for an electron, g ≈ 2 and μ B = e ¯ h/ 2 m . (b) Suppose that a perturbation is added for times t > 0, of the form H = gμ B B ¯ h S x (2) with B ± B . What is the maximum transition probability in ﬁrstorder perturbation theory, starting in the spindown state at t = 0, if B = 104 Tesla? Plot the transition probability as a function of time. 1...
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 Fall '07
 MOORE
 Physics, mechanics, Electron, Photon, Magnetic Field, Fundamental physics concepts, Perturbation theory

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