An object kept at 20 cm from a spherical mirror gives rise to an image 15 cm behind the mirror. The focal length of the mirror is:
An object 20 cm from a convex mirror gives rise to a virtual image 15 cm behind the mirror. The focal length of the mirror is
An object 20 cm from a spherical mirror gives rise to a virtual image 15 cm behind the mirror. Determine the magnification of the image and the type of mirror used.
A real image of half the size is obtained in a concave spherical mirror with a radius of curvature of 40cm. The distance of the object and that of its image will be