An object is placed between infinity and the pole (P) of a convex mirror. The position of the image is

When an object is placed at a finite distance (between infinity and the pole) in front of a convex mirror, the image is always formed behind the mirror [1]. Specifically, the image is located between the pole (P) and the principal focus (F). This occurs because light rays incident on a convex mirror diverge upon reflection; when these diverging rays are extended backward, they intersect between P and F. Regardless of the object's position along the principal axis (except at infinity), the resulting image remains virtual, erect, and diminished in size [2]. If the object were at infinity, the image would form exactly at the focus. Therefore, for any position between infinity and the pole, the image position is restricted to the region between the pole and the focus behind the mirror.

Sources

1. [1] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 10: Light: Mirrors and Lenses > Activity 10.3: Let us explore > p. 156
2. [2] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 10: Light: Mirrors and Lenses > Snapshots > p. 165