Guru Nanak Dev University 2005 B.Sc Chemistry OPTICS (Chem-105) -2k5 - Question Paper

B.Sc. (H.S.) In Chemistry first Semester
2125
PAPER - Chem-105
OPTICS

Time Allowed : three hours

Maximum Marks : 75

Note : Attempt 5 questions, selecting atleast 1 from every part.

part - A (Compulsory)

1.

(a) elaborate UV and IR sources of light?

(b) elaborate properties of LASER light?

(c) provide 3 applications of lasers?

(d) Why color of sky looks blue.

(e) What is optical activity ?

(f) provide the relation ranging from phase and path difference.

(g) How polarizer is various from an analyzer ?

(h) What is Brewster's legal regulations ?

(i) discuss the term dispersive power.

(j) How circularly polarized light is produced ?

part - B

2. discuss the conditions and formations of interference fringes in Young's Experiment. Also obtain the Fringe width.

3. explain the formation of interference fringes in thin films for reflected and transmitted light systems.

part - C

4. discuss Rayleigh criterion for resolution. Write a detailed note on phase contrast microscope.

5. What is diffraction and explain the Fraunhoffer diffraction trend due to double slit >

part - D

6. discuss the term specific rotation of a solution and method to obtain it.

7. elaborate plain, circularly and elliptically polarized lights and how will you produce them ?

part - E

8. Write detailed notes on lasers and holography.

9. explain the details of mercury, sodium UV and IR sources of light.

Earning:   Approval pending.