When the object is at infinity from the concave mirror, the image is at the focus and it is a diminished, inverted image. As the object is brought towards the mirror the image shifts away from the mirror and its size increases. When the object is at centre of curvature of the mirror, the image is also at the centre of curvature and it is of size equal to the size of .object. By further bringing the object towards the mirror, the image gets magnified and it moves away from the centre of curvature. When the object is at the focus of mirror, the image is at infinity. If the object is further moved towards the mirror, the image now becomes erect and magnified and it is formed behind the mirror.