Ph.D. Course Work Examination Jan/Feb-2018
PHYSICS (Paper II)
Recent Trends in Physics
Day Date: Wednesday, 17-01-2018
Max. Marks: 100
Time: 11.00 AM to 02.00 PM
Instructions: All questions are compulsory.
Q.1

What is crystal system? Explain the method of determination of lattice parameters for cubic and tetragonal crystal systems?
10

Write a short note on any two:
10
Principle of image formation
Powder diffraction method
Data processing and refinement
Q.2

Discuss the principle of FE-SEM microscopy and give advantages over SEM and TEM microscopy?
10

Write a short note on any two:
10
Principle of TEM microscopy
Concept of electron diffraction
Secondary electrons and images
Q.3

Write in detail the determination of optical band gap using absorption spectroscopy.
10

Write a short note on any two:
10
UV absorption spectra for organic molecules
IR Sensitive modes of vibration
Advantages of FTIR instrumentation
Q.4

Explain in detail atomic force microscope (AFM).
10

Write a short note on any two:
10
Magnetic force microscope
Effect of conjugation
Electrostatic force microscope
Q.5

Explain the contact mode and tapping mode using atomic force microcopy.
10

Write a short note on any two:
10
Chemical shift
Data interpretation and analysis
Band analysis and work function measurement