A point source of light is placed at a distance of 2f from a converging lens of focal length f. The intensity on the other side of the lens is maximum at a distance

Question

A point source of light is placed at a distance of 2 f from a converging lens of focal length f . The intensity on the other side of the lens is maximum at a distance

Philoid · Accepted Answer

Maximum intensity signifies the place of image formation.

The lens formula is .

So, putting u =-2f, we get the answer.