When the object AB is placed between the center of curvature C and focus F, then the ray AD which is parallel to the principal axis and another ray AE through the principal focus F intersect each other at point A’ beyond the center of curvature. Thus, the image is formed beyond C, which is enlarged, real and inverted.

NOTE: Center of curvature is the center of the sphere of which the spherical mirror is a part. Principal axis is an imaginary line passing through the pole and the center of curvature of a spherical mirror. Pole is the midpoint of a spherical mirror. Principal focus or focus is a point on the principal axis, where a beam of light, parallel to the principal axis, after reflection, either actually meets (concave) or appears to meet (convex).