Question

A boy runs towards a convex mirror with a speed v. His image is seen to move towards the mirror at a speed v'. Then :

• A. $v$
• B. $v>v^{\prime }$
• C. $v=v$
• D. Nothing can be said as data are insufficient

Answer 1

The correct option is B $v>v^{\prime }$

In a convex mirror, the image distance is smaller than the object distance. That is, when an object moves towards the convex mirror, the image appears to move closer at a faster rate.

Hence, the speed of the approaching object is faster than the speed of the approaching image. That is, $v>v^{\prime }$