[" 3.A concave mirror has a focal length of "20cm" .Find the "],[" position or positions of an object for which the image- "],[" size is double of the object-size."]

A concave mirror has a focal length 20 cm. The distance between the two positions of the object for which the image size is double of the object size is

A concave mirror has a focal length 20 cm. The distance between the two positions of the object for which the image size is double of the object size is

A concave mirrorr has a focal length 20 cm. The distance between the two positions of the object for which the image size is double of the object size is

State the position of object for which the image formed by a concave mirror is of same size.

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 ?