When an object is kept at a distance of 30 cm from a concave mirror
PHYSICS · Subjective · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction
Problem
When an object is kept at a distance of 30 cm from a concave mirror, the image is formed at a distance of 10 cm from the mirror. If the object is moved with a speed of 9 cms−1 , the speed (in cms−1 ) with which image moves at that instant is _____