Where should an object be placed in order to use a convex lens as a magnifying glass ?
For a magnified image to be observed the distance between the object and the lens has to be shorter than the focal length of the lens.
Where should an object be placed in front of a convex lens so as to obtain its virtual, erect and magnified image ?
A convex lens has a focal length of 10 cm. At which of the following position should an object be placed so that this convex lens may act as a magnifying glass ? (a) 15 cm (b) 7 cm (c) 20 cm (d) 25 cm