Question

a convex lens produces a real image on a screen placed at a distance of 30 cm from the object find the focal length of the lens under what condition a convex lens produces a real image on a screen​

Answer 1

Plane mirrors, convex mirrors, and diverging lenses can never produce a real image. A concave mirror and a converging lens will only produce a real image if the object is located beyond the focal point (i.e., more than one focal length away). ... The image of an object is found to be upright and reduced in size.