One can think of a circle as an N-sided polygon where N is a very very large number. This is because as the number of sides of a polygon increases the shape of the polygon starts resembling that of a circle. In the light of this fact explain why the diffraction pattern produced by the aperture DOTS is made of alternating bright and dark circular bands. Hint: First determine the diffraction pattern produced by an N-sided polygon. Then figure out what would happen to the diffraction pattern if the number of sides N becomes very large.