Bharathiar University 2007 M.Phil Spectroscopy - Question Paper

M.Phil. Spectroscopy May-June 2007

Time : 3 hours Maximum : 100 marks
ans any 5 ques..
All ques. carry equal marks.
1. (a) Explain the basic functions of radiation sources. explain the vital features of the radiation sources :
(i) hydrogen discharge lamp and
(ii) incandescent filament lamp.
(b) Describe the construction and working of photomultiplier tube.
2. (a) Write a detailed note on interference filters.
(b) What is diffraction grating? define its construction, principle of working and how it is used for analyzing spectras.
3. Explain the construction and working of a pneumatic nebulizer. Write a detailed note on flame mission spectrometry.
4. Explain the components and working of a direct current arc. How the sensitivity of the arc can be improved? define the construction and working of Echelle grating spectrometer.
5. What are the different infrared radiation sources? provide the general principle of working of Photon detectors. State the merits of this method. define the photoconductive and photo voltaic IR detectors used in the analysis of infrared radiation.
6. Describe the various sampling techniques used in IR radiation. Compare Raman and IR spectroscopy. explain the polarization measurements.
7. Give the theory of x-ray absorption methods for identifying the presence of elements in a sample. define the operation of a nondispersive x-ray absorption meter.
8. What is the basic principle involved in nuclear magnetic spectroscopy? discuss how it helps for the identification of atomic configuration in molecules. Write a note on NMR energy level.

Earning:   Approval pending.