A student has to project a three times magnified image of a candle flame on a wall.
Channel: Doubtnut
Date: 2020-07-26

A student has to project a three times magnified image of a candle flame on a wall. Name the type of the lens (converging/diversing) required for the purpose. If the candle flame is at a distance of 6 m from the wall, find the focal length of the lens.