DISTANCE EDUCATION
M.Sc. (Physics) DEGREE EXAMINATION, MAY 2017.
SOLID STATE PHYSICS
(2008 onwards)
Time Three hours Maximum 100 marks
Answer any FIVE questions.
Each question carries 20 marks.
20 100)
1. Explain Bragg's law for X-ray diffraction in crystals.

Write a note on quasi crystals.
What are Brillouin Zones? Discuss the construction
of the first three Brillouin zones for a square lattice.

2. What are elastic compliance constants and elastic
stiffness constants?
Sketch the elastic waves in cubic crystals with
necessary theory.
Explain the following
Atomic form factor
Hydrogen bonds.
3. Describe the inelastic scattering of phonons.
Give an account on Einstein's theory of specific heat
of solids.
Sub. Code
23
DE- 656
2
wk 3
4. Derive the expression for the specific heat of a solid
on the Einstein temperatures it drops exponentially
with decreasing temperature.
Write short note on Nano structures.
Give an account of Fermi-Dirac distribution
function.
5. Describe the thermal conductivity of metals.
Solve the wave equation of electron in a periodic
potential.
6. Write a note on
Semimetals
Super lattices.
Nano structures.
7. What is meant by mononuclear system? Explain the
quantum theory of diamagnetism of Mononuclear
system.
Derive Langevin equation for diamagnets.
8. Explain the quantum theory of para-magnetism.
Write notes on
Antiferro electricity
Ferro electric domains
Piezo electricity.