= Newton's rings
{wiki=Newton's_rings}
Newton's rings are a pattern of concentric circular fringes that appear when a plano-convex lens is placed on a flat glass surface, creating an air film of varying thickness between the two surfaces. This optical phenomenon is named after Sir Isaac Newton, who studied the interference of light. \#\#\# Formation: When monochromatic light (light of a single wavelength) is shone on the setup, some of the light reflects off the top surface of the lens while some reflects off the flat glass surface.
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