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Wave Optics: Interference of lignt: Newton's Rings

The drawing shows a cross section of a plano-concave lens resting on a flat glass plate. (A plano-concave lens has one surface that is a plane and the other that is concave spherical.) The thickness t is 1.35 * 10^-5 m. The lens is illuminated with monochromatic light (lambda vacuum = 570 nm), and a series of concentric bright and dark rings is formed, much like Newton's rings. How many bright rings are there?


Solution Summary

A problem related to Newton's rings is solved.