Nalanda Open University 2009 B.Sc Physics Final , Bachelor Science ( Hons), Part-III -VII - Question Paper
Final Examination, 2009 Bachelor Science (Physics Hons), Part-III Paper-VII (Physics)
Final Examination, 2009 Bachelor Science (Physics Hons), Part-III Paper-VII (Physics)
Time: 3.00 Hrs. Full Marks: 75
Answer any Five Questions. All questions carry equal marks
1. What are Lienard - Wiechert potentials? Obtain an expression for the scalar and vector Lienard -Wiechert potentials.
2. Discuss the electromagnetic field tensor pointing out its significance.
3. What do you mean by Debye length? Obtain an expression for it. Calculate the Debye length if the plasma temperature T =103K and particle density n0 = 1015/m3.
4. State and explain Paschen - Back effect.
5. State and derive Moseley's law. Discuss its importance in the study of X-ray spectra.
6. Discuss the rotational spectra of a diatomic molecule treated as a rigid rotator.
7. Discuss the principle of E.S.R. Spectroscopy. How do you study fine structure from ESR spectrum?
8. Define Nuclear Angular Momentum, Nuclear Magnetic Moment and Nuclear Quadrupole Moment. Find an expression for Nuclear Quadrupole Moment.
9. Give an account of the shell model of the nucleus and explain how it is used to assign values of nuclear levels.
10. Write notes on any two of the following:
(a) Scalar and Vector potentials
(b) Plasma Oscillation
(c) Vibrational Spectra
(d) Holography
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