The radius of curvature of the left & right surface of the concave lens are 10 cm & 15 cm respectively. The radius of curvature of the mirror is 15 cm.

In the figure shown the radius of curvature of the left & right surface of the concave lens are 10cm & 15 cm respectively. The radius of curvature of the mirror is 15 cm . equivalent focal length of the combination is

If the radii of curvature of the two surfaces of a concave lens are 10 cm and 20 cm respectively and the refractive index is 1.5. What is its focal length ?

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