BACHELOR OF SCIENCE (HONS) : Newton's ring
17 Jul 2022
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Document Summary
A significant utilization of interference in thin films is the development of newton"s rings. At the point when a plano convex lens of long focal length is put over an optically plane glass plate, a slight air film with varying thickness is enclosed between them. The thickness of the air film is zero at the point of contact and slowly increments outwards from the point of contact. At the point when the air film is enlightened by monochromatic light typically, substitute bright and dark concentric round rings are formed with dark spot at the middle. When seen with white light, the edges are colored. Figure shows a trial course of action for creating and noticing newton"s rings. A monochromatic source of light s is kept at the focal point of a condensing lens l1. The parallel beam of light rising up out of l1 falls on the glass plate g kept at 45 degree.
