The distance of an object and its real image, measured from the focus of a concave mirror, are a and b respectively. Show that `f^(2) = ab`.

The distances of the real image of an object and the object, from the focus of a concave mirror are respetively b and a. Find the focal length of the concave mirror in terms of a and b.

The real object distance and real image distance from a concave mirror are p and q respectively. Draw a graph between 1/p and 1/q .

If the object distance and image distance from the focus of a spherical mirror of focal length f be x and y respectively, then

The size of the image of an object placed at the focus of a concave mirror is ………….. .