A plano convex lens of refractive index 1.5 and radius of curvature 30cm. Is silvered at the curved surface. Now this lens has been used to form the image of an object. At what distance from this lens an object be placed in order to have a real image of size of the object.

A plano-convex lens has refractive index 1.6 and radius of curvature 60 cm. What is the focal length of the lens?

A plano-convex lens is made of glass of refractive index 1.6. the radius of curvature of its curved surface is 30 cm. What is the focal length of the lens ?

A plano-convex lens is made of material having refractive index 1.5. The radius of curvature of curved surface is 60 cm. The focal length of the lens is ______ cm.

Focal length of an equiconvex lens is 20 cm. The refractive index of material of the lens is 1.5. Now one of the curved surface is silvered. At what distance from the lens an object is to be placed, so that image coincides with the object ?

An object is placed in front of a symmetrical convex lens with refractive index 1.2 and radius of curvature 40cm .the surface of the lens further away from the object is silvered.Under auto-collimation condition is ,the obejct distance is

A plano-covex lens is made of a material of refractive index n. When a small object is placed 30cm away in front of the curved surface of the lens, an image of double the size of the object is produced. Due to reflection from the convex surface of the lens, another faint image is observed at a distance of 10 cm away from the lens. Which of the following statement (s) is (are) true?

A luminous object is placed at a distance of 30 cm from the convex lens of focal length 20 cm . On the other side of the lens, at what distance from the lens a convex mirror of radius of curvature 10 cm be placed in order to have an upright image of the object coincident with it ?