Question

Distinguish between interference and diffraction.

Answer 1

Interference	Diffraction
It is due to the superposition of secondary wavelets from two different wave fronts produced by two coherent sources.	It is due to the superposition of secondary wavelets emitted from various points of same wave front.
Fringes are equally spaced.	Fringes are unequally spaced.
Bright fringes are of same intensity.	Intensity falls rapidly.
Comparing with diffraction, it has large number of fringes.	It has less number of fringes.