To form an enlarged image the object should be placed in front of a convex lens
Anywhere between 2F and O
At F
Anywhere between infinity and F
Anywhere between C and infinity
A virtual, erect and magnified image of an object is to be obtained with a convex lens. For this purpose, the object should be placed : (a) between 2F and infinity (b) between F and optical centre (c) between F and 2F (d) at F
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 ?