A thin lens with centres of curvature `C_(1) and C_(2)` is shown in the figure given below. If the refractive index of material of lens is 1.5, calculate the focal length in cm.

A bicovex lens has radii of cuvature 20 cm each. If the refractive index of the material of the lens is 1.5, what is its focal length?

A concave lens has radioi of curvatures of 20 cm and 30 cm respectively. If the refrative index of the material of lens is 1.6 it focal length is given by

Shows a thin lens with centres of curvature C_1 and C_2 . If mu = 1.5 , what is its focal length ? .

Consider an equiconvex lens of radius of curvature R and focal length f. If fgtR , the refractive index mu of the material of the lens

There is a thin double convex lens having surfaces of radius of curvature R and 2R. Lens is kept in air and refractive index of the material of the lens is mu . Focal length of the lens

A double convex lens has faces of radii of curvature 30 cm each. The refractive index of the material of the lens is 1.5. What is the focal length of this lens when immersed is carbondisulphide of refractive index 1.6 ?

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

A biconvex lens has a focal length half the radius of curvature of either surface. What is the refractive index of lens material ?