A plano-convex lens `mu = 1.5` has focal length of 18 cm in air. Calculate the radius of curvature of the spherical surface.

A plano convex lens made of glass (n=1.5) has a focal length 10.0 cm. (i) calculate the radius of curvature surface. (ii) If an identical plano-convex lens is placed in contact with the first (plane surface facing each other), What will be the power of the combination ( in diopter) ? (b) An astronomical telescope consists of two convex lenses having focal length 80 cm and 4 cm. When it is normal adjustment, what is its : (i) length (ii) Magnifying power ?

A plano-convex lens has focal length of 20 cm. the radius of its spherical suface is (""_(a) mu_(g)=1.5)

A plano-convex lens has focal length of 20 cm. the radius of its spherical suface is (""_(a) mu_(g)=1.5)

A plano-convex lens (focal length f_2 , refractive index mu_(2) , radius of curvature R) fits exactly into a plano-concave lens (focal length f_(1) refractive index mu_1 , radius of curvature R). Their plane surfaces are parallel to each other. Then, the focal length of the combination will be :

A plano-convex lens (focal length f_2 , refractive index mu_(2) , radius of curvature R) fits exactly into a plano-concave lens (focal length f_(1) refractive index mu_1 , radius of curvature R). Their plane surfaces are parallel to each other. Then, the focal length of the combination will be :

The refractive index and the focal length of a plano convex lens are 1.5 and 50 cm respectively. What is the radius of curvature of the curved surface ?