Question

1) what is the best way to increase the width of the beam?

2) Explain how you can calculate the diameter of the pinhole used for Fraunhofer diffraction with the help of the experiment. Explain in detail the procedure steps followed to get readings in your own words and the equations used.

3) Describe the type of lenses used in a Galilean expander and in a Keplerian expander. Draw Keplerian beam expander and show the expression for distance between two lenses. What is the power of the Galilean beam expander used in the lab experiment?

Answer 1