Ex 3: Use the mirror equation to show that the image of an infinitely distant object is formed at the focus of a spherical mirror. Ex 4: A 3.25 cm high object is placed 28 cm in front of a convex mirror. Its image was formed 14 cm behind the mirror. Find the (a) magnification of the image, (b) height of the image, (c) focal length of the mirror, and (d) radius of curvature of the mirror