Question

An object is placed in front of a convex mirror at a distance of 60m from its pole object start moving toward the mirror at 20 metre per second find the average velocity of the image for a time interval of 2 seconds if the focal length of the mirror is 20 metre

Answer 1

Answer:

When an object is placed at a distance 60 cm from a convex spherical mirror, the magnification produced is 1//2. Where should the object be placed to get a magnification of 1//3 ? u′=-120cm.