An object is placed 42 cm, in front of a concave mirror of focal length 21 cm. Light from the
Channel: Doubtnut
Date: 2020-07-05

An object is placed 42 cm, in front of a concave mirror of focal length 21 cm. Light from the  concave mirror is reflected onto a small plane mirror 21 cm in front of the concave mirror  Where is the final image?