16 Marks Questions

Part - B

‘16’ Marks

Anna University Questions: 

1. Explain the formation of interference fringes in an air-wedge shaped film. How is the thickness of the wire determined by this method?

2. Describe Michelson interferometer and explain how the fringes form in it. How can this be used for measuring the wavelength of monochromatic light. Derive the formula.

3. How will you use Michelson's interferometer to determine the thickness of a thin transparent film or plate. 

4. Explain the construction, types of fringes and applications of Michelson interferometer.

5. (i) Describe the construction of a Michelson's interferometer and discuss the different types of interference fringes formed in it. 

(ii) How will you use it to determine the wavelength of a monochromatic source?