N A L A N D A O P E N U N I V E R S I T Y
M.Sc. Physics, Part-II
PAPER-XI
(Physics of Nano-materials)
Annual Examination, 2017
Time 3 Hours. Full Marks 80
Answer any Five Questions.
All questions carry equal marks.
1. On the basis of free electron theory derive expression for the electrical and thermal
conductivity of metal and hence establish Wiedmann-Franz law.
2. Explain the band formation in the hydrogen molecule. What do you mean by energy bands in
Crystals
3. Show that the effective mass of a free electron is the same as its mass in vacuum.
4. Obtain the eigenvalues and normalized eigenwavefunction of a particle in one dimensional
infinite potential box of side
5. What is a quantum dot Discuss the structure and characteristics of various types of quantum
dots.
6. What is Raman effect Discuss the variations in Raman Spectra of nanomaterials.
7. Describe the citrate precursor technique for preparation of nanoparticles.
8. Discuss Drude's free electron theory and deduce expression for electrical conductivity.
9. Discuss the properties of electrons in a band. Why liquid hydrogen is like liquid metal.
10. Discuss the motion of electron of mass m in a rectangular box × b × and obtain
expression for total normalized wave function and eigenvalue of energy of the electron.