11. The spherical surface of a plano-convex lens (n1 = 1,52) in contact with the glass plate (n2 = 1,7). The space between the lens, the radius of curvature R = 1 m, and the plate is filled with fluid. Watching Newton's rings in reflected light (λ0 = 0,589 m), measured the radius rk tenth dark ring. To determine the refractive index of the liquid nzh in two cases: 1) rk = 2,05 mm 2) rk = 1,9 mm.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)