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Question: when spinorbit interaction and relativistic effects are accounted for quantum...

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When spin-orbit interaction and relativistic effects are accounted for, quantum mechanics predicts that the fine structure of the Balmer-alpha emission line in atomic hydrogen is predicted to comprise the seven transition components shown in the diagram below. 2. 3d 3d 3Py 3Pn 3 Sy 2s n-2 Explain in general terms how quantum mechanics accounts for the fact that the different line components will have very different intensities? (2 marks) (a) Explain in detail and with suitable experimental diagrams how the technique of laser saturation spectroscopy may be used to observe the individual components. Why is standard high resolution spectroscopy of a gas discharge unable to resolve the four components of different wavelength? (b) 6 marks) Explain what is meant by the Lamb Shift, and indicate its effect on the observed Balmer-alpha spectrum? (c) (2 marks)

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