Question

In each of the following cases, where must an object be placed in front of a convex lens so that the image formed is

(a) at infinity,

(b) of same size as the object,

(c) inverted and enlarged,

(d) upright and enlarged image?

Answer 1

(a) at focus,

(b) at 2F,

(c) between F and 2F,

(d) between optical centre and focus.