Question
What happens to the size of the image formed by a convex mirror, when an object is gradually moved towards the mirror?
Solution
Fig (a). Illustration of ray diagram for the image formed, when the object is gradually moved towards the mirror.
As shown in Fig.(a), when the object is at position A1B1, its virtual image is at a1b1. When the object is moved closer towards the pole, i.e., when it is at A2B2, its virtual image is at a2b2.
Thus, we can observe that, when an object is gradually moved towards the pole of a convex mirror, the image formed also moves towards its pole and gradually increases in size, till it has a size almost equal to that of the object.
However, the image is always formed between the focus and pole .
