WBJEE 2019 Physics Solved Paper

A point object is placed on the axis of a thin convex lens of focal length 0.05 m at a distance of 0.2 m from the lens and its image is formed on the axis. If the object is now made to oscillate along the axis with a small amplitude of A cm, then what is the amplitude of oscillation of the image ?
[ you may assume,

1

1+x

≈ 1 - x, where x << 1 ]