A converging lens is used to produce an image on a screen of an object. What change is needed for the image to be formed nearer to the lens?
Answer & explanation
Correct answer: option 3
If $\frac{1}{v}=\frac{1}{f}-\frac{1}{u}$
If u → increases, $\frac{1}{u}$ → decreases and $\frac{1}{v}$ → increases. So v decreases.