A dentist uses a small mirror that gives a magnification of 4 when it is held 0.60 cm from a tooth. The radius of curvature of the mirror is

An arrow of length 15 cm is placed along the axis of a concave mirror. Its sharp end is at a distance of 30 cm from the mirror and the radius of curvature of the mirror is 20 cm . Calculate the magnification of the image of the arrow.

The radius of curvature of a plane mirror of length 40 cm is :

When an object is placed at 6 cm in front of a concave mirror, its virtual image is formed at 15 cm from the mirror. Find the focal length and radius of curvature of the mirror.