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The spherical surface of a plano-convex ...

The spherical surface of a plano-convex lens comes into contact with a glass plate. The space between the lens and the plate is filled up with carbon dioxide. The refractive indies of the lens, carbon dioxide, and the plate are equal to `n_(1) = 1.50, n_(2) = 1.63`, and `n_(3) = 1.70` respectively. the curvature radius of the spherical surface of the lens is equal to `R = 100 cm`. Determine the radius of the fifth dark Newton's ring in reflected light with wavelength `lambda = 0.50 mu m`.

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