The radii of curvature of the faces of a double convex lens are 10cm and 15 cm, its focal length is 12 cm. What is the refractive index of the glass?

The radii of curvature of the faces of a double convex lens are 10 cm and 15 cm, Its focal length is 12 cm. What is the refractive index of the glass ?

The radii of curvature of the faces of a double convex lens are 20 cm and 30 cm. Its focal length is 24 cm. What is the refractive index of the glass?

The radii of curvature of the faces of a double convex lens are 20 cm and 20 cm. Its focal length is also 20 cm. What is the refractive index of the glass?

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

The radii of curvature of the two surface of a convexo concave ens ae15 cm and 30 cm .Find the focal lenth of the lens,if eh refractiveindex of its mterial is 1.6.

The radius of curvature of eithr face of a conex lens is equal to ts focal length .What is the refractive index of its material?

Find the radius of curvature of the convex surface of a plano convex lens,whose focal length is 0.3 m and the refractive index of the material of the lens is 1.5/