Лаг1989 задача №20.19

An apparatus for producing Newton´s rings is illuminated by monochromatic light. Observation is conducted in reflected light. The radii of two adjacent dark rings are 4 mm and 4.38 mm, respectively. The radius of curvature of the lens is R = 6.4 m. Find the serial numbers of the rings and the wavelength λ of the incident light.

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