An object appraches a convergent lens from the left of the lens with a uniform speed `5m//s` and stops at the focus. The image

Options

A. moves away from the lens with an uniform speed 5m/s
B. moves away from the lens with an uniform acceleration
C. moves away from the lens with a non-uniform acceleration
D. moves towards the lens with a non-uniform accelration

Answer

3

Explanation

In our problem the object approaches a convergent lens from the left of the lens with a uniform speed of 5m/s, hence the image will move away from the lens with a non-uniform acceleration, the image moves slower in the beginning and faster later on will move from F to 2F and when the object moves from 2F to F, the image will moves from 2F to infinity. At 2F, the speed of the object and image will be equal