## How would you produce and detect

1. Plane

2. Circularly polarized and

3. Elliptically polarized light

## In a michelson interferomete, When 100 fringes were shifted, The final reading of the screw was found to be 10.735 mm.

If the wavelength of the light was $5.92×{10}^{-7}m,$

What was the initial reading of the screw?