The focal length of a concave mirror is `30`cm.Find the position of the object in front of the mirror,so that the image is there times the size of the objects.

The focal length of a concave mirror is 30 cm.Find the position of the object in front of the mirror,so that the image is three times the size of the objects.

The focal length of a concave mirror is 30 cm.Find the position of the object in front of the mirror,so that the image is three times the size of the objects.

Find the position of the object for a convex mirror of focal length 20 cm, when the size of the image is half the size of the object.

An object is placed at a distance of 20 cm in front of a concave mirror of focal length 10 cm. Determine the position of the image. What is the ratio of the size of the image to the size of the object ?

Find two positions of an object, placed in front of a concave mirror of focal length 15cm, so that the image formed is 3 times the size of the object.

Find the distance of object from a concave mirror of focal length 10 cm so that image size is four time the size of the object.