Newton Ring Lenses

Home > Optical Instruments > Newton Ring Lenses

Newton's ring lens is two plano-convex lenses with their flat surfaces in contact. The surface is slightly convex creating the rings. In white light the rings are rainbow-colored because the different wavelengths of each color interfere at different locations. The concentric circles produced by the Newton's rings phenomenon typically are dark alternating with bright, with the dark beginning in the center. The phenomenon occurs as a result of interference between the light reflected by the two surfaces.