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ALAGAPPA
UNIVERSITY
KARAIKUDI – 630 003
UNIT BASED ONLINE EXTERNAL EXAMINATION - NOVEMBER – 2020
THIRD
SEMESTER SLOT – II
OPTICS AND SPECTROSCOPY - 7BPH3C1
Total Marks: 25 Time: 1.0 Hr
SECTION A – SHORT ANSWER - 5 x 2 = 10 Marks
ANSWER ALL THE QUESTIONS
1. What
is a Poisson spot?
2. Define
Fresnel half period zone.
3. What is a Polaroid?
4. What is a
symmetric top?
5. State any
two applications of vibrational Raman spectra.
SECTION B - DESCRIPTIVE - 3 x 5 = 15 Marks
ANSWER ANY THREE
6. Discuss the
Fresnel theory of rectilinear propagation of light.
7. Bring out
the similarities and differences between a zone plate and a convex lens.
8. Explain the
working of half-wave plate.
9. Write note
on the intensity of spectral lines.
10. Explain the classical theory of Raman Effect.