A point object is moving on the principal axis of a concave mirror of focal length `24 cm`  towards
Channel: Doubtnut
Date: 2020-08-23

A point object is moving on the principal axis of a concave mirror of focal length `24 cm`  towards the mirror. When it is at a distance of  `60 cm`  from the mirror, its velocity is . `9 sec// cm`  What is the velocity of the image at that instant