Friday, July 29, 2016

NOU Classical Electrodynamics Plasma Physics Physics of Atoms Molecules and Nuclei 2015 Question Paper

Nalanda Open University
Annual Examination - 2015
B.Sc. Physics (Honours), Part-III
Paper-VII (Classical Electrodynamics, Plasma Physics, Physics of Atoms, Molecules and Nuclei)
Time: 3.00 Hrs. Full Marks: 80
Answer any five questions. All questions carry equal marks.
1. Establish the covariance of Maxwell's equations under Lorentz transformation.
2. What are retarded and advanced potentials? Obtain retarded and advanced potentials by the solution of inhomogeneous wave equation. Give physical interpretation of these potentials.
3. Define plasma state and describe all plasma parameters. Define the concept of temperature in Plasma.
4. With the help of necessary diagrams of the experimental set-up describe the Stern-Gerlach experiment and show how it explains the existence of the magnetic moment of an electron due to its spin.
5. State and explain Paschen-Back effect. Give its quantum mechanical explanation.
6. Discuss the rotational spectra of diatomic molecule treated as a rigid rotator.
7. What is LASER? Explain its origin theoretically. Describe and explain the theory of working of a He-Ne laser.
8. Discuss spin magnetic moment and electric quadruple magnetic moment associated with atomic nucleus.
9. Give an account of the 'liquid drop model' of nucleus. Explain 'magic number' for nuclei.
10. What do you mean by NMR spectroscopy? Describe with diagram, the continuous wave NMR spectrometer.

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