CUET Preparation Today
A screen is placed at a distance of 90 cm from an object. The image of the object on the screen is formed by a convex lens placed at two different locations separated by 20 cm. The focal length of the lens is approximately |
22 cm 20.8 cm 21.4 cm 19.2 cm |
21.4 cm |
The correct answer is Option (3) → 21.4 cm |
