A convex lens forms a real and inverted image of a needle at a distance of `50 cm` from it.
Channel: Doubtnut
Date: 2020-07-26

A convex lens forms a real and inverted image of a needle at a distance of `50 cm` from it. Where is the needle placed in front of the convex lens if the image is equal to size of the object ? Also, find the power of the lens.