Subject: Applied Physics 2

Topic: Interference And Diffraction Of Light

Difficulty: Medium

State giving the reasons what change do you expect in newton’s ring

(i) if top surface of the glass plate on which the lens is kept is highly silvered.

(ii) if the lens is lifted slowly off the plate by a distance of half the wavelength.

(i) If the top surface of glass plate on which the lens is kept is highly silvered or replaced by plane mirror, the fringes will disappear and we shall get a uniform illumination. It is because the intensity of light reflected from the surface of the mirror is very large …