When a Plano-convex lens with its convex surface is placed on a plane glass plate, an air film gradually increasing thickness is formed between the two. The thickness of the film at the point of contact is zero. If monochromatic light is allowed to fall normally, and the film is viewed in reflected light , alternate dark and bright concentric rings with their center dark is formed between the lens and glass plate are seen. Since the phenomenon was described by Newton that is way the rings are known as Newton's Rings after his name.
No comments:
Post a Comment