DISTANCE EDUCATION
M.Sc. (Physics) DEGREE EXAMINATION, DECEMBER 2017.
SPECTROSCOPY
(2008 Onwards)
Time Three hours Maximum 100 marks
Answer any FIVE questions.
Each question carries 20 marks.
x 20 100)
1. Discuss in detail the Heitler London theory for
hydrogen molecule.
What is hybridization? Explain sp2 hybridization
with an example.
2. Explain molecular orbital theory.
Explain the classification of molecules according to
their principal moments of inertia.
What is stark effect? Explain its importance in
microwave spectroscopy.
3. Deduce the rotational constant of a rigid diatomic
molecule.
Outline the importance of the quadruole hyperfine
interaction in rotational spectroscopy.
Deduce the moment of inertia of a linear poly
atomic molecule.
Sub. Code
21
DE-2956
2
Sp 6
4. State and explain mutual exclusion principle.
Write notes on pre-dissociation of a molecule.
Explain in detail the pure rotational Raman spectra
of diatomic linear molecule.
5. Write down the special features of vibrational
Raman spectra.
What are the information on molecular constitution
obtained from IR studies? Explain with an example.

Describe Frank Condon principle in emission and
absorption.
6. What is hyper Raman effect? Explain.
Elaborate the classical treatment of hyper Raman
effect.
Write a note on multiphonon absorption.
7. Describe about stimulated Raman scattering.
Describe the experimental arrangement for
studying Mossbaure spectra.
8. Derive the Bloch equations for nuclear resonance.

Write about spin-lattice interaction.
Give the theory of NMR spectroscopy.