Q65)The Newton's rings are observed in reflected light of wavelength 6300Å. A thin layer of liquid of refractive index 1.63 is formed between curved surface of plano-convex lens (mu = 1.69) and plane glass plate (mu = 1.03) and the radius of curvature of the curvex lens is 0.9m. Find the radius of smallest dark ring....The Newton's rings are observed in reflected light of wavelength 6300Å. A thin layer of liquid of refractive index 1.63 is formed between curved surface of plano-convex lens (mu = 1.69) and plane glass plate (mu = 1.03) and the radius of curvature of the curvex lens is 0.9m. Find the radius of smallest dark ring......The Newton's rings are observed in reflected light of wavelength 6300Å. A thin layer of liquid of refractive index 1.63 is formed between curved surface of plano-convex lens (mu = 1.69) and plane glass plate (mu = 1.03) and the radius of curvature of the curvex lens is 0.9m. Find the radius of smallest dark ring.