A plano-convex glass lens with curvqature radius of spherical surface `R = 12.5 cm` is pressed against a glass plate. The diameters of the tenth and fifteenth dark Newton's rings in reflected light are equal to `d_(1) = 1.00 mm` and `d_(2) = 1.50 mm`. Find the wavelength of light.

The convex surface of a plano-convex glass lens with curvature radius R = 40 cm comes into contact with a glass plate. A certain ring observed in reflected light has a radius r = 2.5 mm . Watching the given ring, the lens was gradually removed from the plate by a distance Delta h = 5.0 mu m . What has the radius of that ring become equal to?

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 .

Two plano-convex thin glass lenses are brought into contact with their spherical surfaces. Find the optical power of such a system if in reflected light with wavelength lambda = 0.60 mu m the diameter of the fifth bringht ring is d = 1.50 mm .

A plano-concave lens is made of glass of refractive index 1.5 an the radius of curvature of its curved surface is 50 cm. What is the power of the lens?

A plano-convex lens is made of glass of refractive index 1.6. the radius of curvature of its curved surface is 30 cm. What is the focal length of the lens ?

A plano-concave lens is made of glass (R.l. = 1.5) and the radius of curvature of the curved face is 50 cm. The power of the lens is

A plano-concave lens is made of glass (R.l. = 1.5) and the radius of curvature of the curved face is 50 cm. The power of the lens is

In fresnel's biprismm experiment, the second dark band is at a distance of 1 mm from the central bright band. If D=1m and d=0.9 mm, then the wavelength of light used is

The convex surface of a plano-convex glass lens comes into contact with a glass plate. The curvature radius of the lens's convex surface is R , the wavelength o flight is equal to lambda . Find the width Delta r of a Newton ring as a function of its radius r in the region where Delta r lt lt r .