NEET2023PhysicsRay OpticsActual
An object is mounted on a wall. Its image of equal size is to be obtained on a parallel wall with the help of a convex lens placed between these walls. The lens is kept at distance x in front of the second wall. The required focal length of the lens will be
Options
- Ax 2
- Bx 4
- CLess than x 4
- DMore than x 4 but less than x 2
Correct answer
A. x 2
Step-by-step solution
Height of image of object equal to height of object for convex lens. If object is placed at 2 f2 f=xf= x 2