CUET Preparation Today
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? |
Increase the focal length of the lens (lens and position of object is fixed). Insert a diverging lens between the lens and the screen (converging lens and position of object is fixed). Increase the distance of the object from the lens. Move the object closer to the lens. |
Increase the distance of the object from the lens. |
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. |
