Question1) Answer all the questions:
a) Write down the format’s principle of least time.
b) Explain cardinal points of a system with diagram.
c) What do you mean by chromatic and monochromatic abberration?
d) Write down the conditions to produce interference fringes.
e) Why do the Newtons’ rings get closer as the order of the rings increases?
Question2) Explain the construction and working of Huygen’s eyepiece show why it could be used for qualitative purpose only.
Question3) Explain principles and working of zone plate compare zone plate with a convex lens.
Question4(a) What are coherent sources? Discuss why two independent sources of light of the same wavelength could not produce interference fringes?
(b) Derive the fringe width in young’s double slit experiment.