UNIT BASED ONLINE EXTERNAL EXAMINATION - NOVEMBER – 2020 - OPTICS AND SPECTROSCOPY - 7BPH3C1 - SLOT II

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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.