The radius of curvature of each plane of a biconvex lens (mu = 1.5) is 20 cm. The power of the lens is: |...

The radius of curvature of a thin planoconvex lens is 10 cm and the refractive index of its glass is 1.5. If the plane surface is silvered, then it will behave like a

If the focal length of the biconvex lens is 25 cm, then the power of the lens will be

The radius curvature of each surface of a convex lens of refractive index 1.5 is 40 cm. Calculate its power.

The radius of curvature of the faces of a double convex lens are 10 cm and 15 cm . If focal length of lens of lens is 12 cm , find the refractive index of the material of th lens.

The radius of curvature of the curved surface of a plano-convex lens is 20 cm . If the refractive index of the material of the lens be 1.5 , it will

The radii of curvature of the faces of a double convex lens are 10 cm and 20. The refractive index of the glass is 1.5. What is the power of this lens (in units of dioptre)?

The radius of curvature of each surface of a biconcave lens made up of glass of refrative indx 1.5 is 30 cm. the focal length of the lens is

Convex lens is made of glass of refractive index 1.5 If the radius of curvature of each of the two surfaces is 20 cm find the ratio of the powers of the lens, when placed in air to its power, when immersed in a liquid of refractive index 1.25 .

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

The radius of curvature of the convex face of a plano convex lens is 12cm and the refractive index of the material of the lends 1.5. Then, the focal length of the lens is