[" The radii of curvatures of a double convex "],[" lens are "15cm" and "30cm," and its refractive "],[" index is "1.5." Then its focal length is - "]

The radii of curvatures of a double convex lens are 15 cm and 30 cm, and its refractive index is 1.5. Then its focal length is -

The radii of curvature of a double convex lens are 30 cm and 60 cm and its refractive index is 1.5. calculate its focal length.

The radii of curvature of double convex lens are 30 cm and 60 cm and its refractive index is 1.5 .Calculate its focal length.

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 radii of curvatures of a convex lens are 0.04 m and 0.04m. Its refractive index is 1.5. Its focal length is

The radii of curvatures of a convex lens are 0.04 m and 0.04m. Its refractive index is 1.5. Its focal length is

The radii of curvature of both the sides of a convex lens are 15 cm and if the refractive index of the material of the lens is 1.5, then focal length of lens in air is ......... cm.

The radii of curvature of the two surface of a double convex glass lens are 10 cm and 20 cm respectively. If the refractive index of glass in 1.5, then its focal length will be