Optics and Spectroscopy - I Internal Test

Optics and Spectroscopy - 7BPH3C1

 I Internal Test

Time : 2 Hrs                                                                                                                           Marks: 40

                                                                        PART - A                                                        5 x 2 = 10

1. Write short note on chromatic aberration in lenses.

2. Define dispersive power of a material.

3. What is an achromatic doublet?

4. State Stoke's Law.

5. What is an air wedge?

                                                                       PART - B                                                      2 x 5 = 10

1. Derive the condition for the minimization of Spherical Aberration when two thin lenses are separated by a distance.
2. Explain how colors appear in thin films due to interference.

                                                                         PART - C                                                     2 x 10 = 20

1. Explain the construction, action and working of Ramsden and Huygens Eyepieces with neat diagrams. Also indicate the position of cardinal points for these eyepieces.
2. Explain the construction of Michelson Interferometer. How the wavelength of monochromatic light can be measured?