I Internal Test - Optics and Spectroscopy

Optics and Spectroscopy - 7BPH3C1

 I Internal Test

Time : 2.5 Hrs                                                                                                                                               Marks: 60

                                                                        PART - A                                                        5 x 2 = 10

1. State Stoke's Law

2. List the uses of air wedge.

3. State Rayleigh Criterion for resolution.

4. Define resolving power of a prism. 

5. State any two differences between Fresnel and Fraunhofer diffraction.

                                                                       PART - B                                                      4 x 5 = 20

1.Explain how colors appear in thin films due to interference.
2.Distinguish between Fresnel and Fraunhofer diffraction.
3.Explain the Fresnel diffraction at a circular aperture.
4.Derive an expression for. resolving power of grating.

                                                                         PART - C                                                     3 x 10 = 30

1.  Explain the working of Michelson Interferometer. How the wavelength of a monochromatic light can be determined?
2. Give the theory of plane transmission grating. Describe an experiment to determine the wavelength of sodium lines.
3. Describe Fraunhofer diffraction at single slit.Derive an expression for the separation between first maxima.