An object is moving towards a concave mirror of focal length
PHYSICS · Single correct · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction
Problem
An object is moving towards a concave mirror of focal length 24 cm. When it is at a distance of 60 cm from the mirror, its speed is 9 cm s−1. The speed of its image at that instant is
(1) 4 cm/s towards the mirror
(2) 6 cm/s towards the mirror
(3) 4 cm/s away from the mirror
(4) 6 cm/s away from the mirror