An object AB is placed between O and `F_(1)` on the principal axis of a converging lens as shown in the diagram.

Mark is an error by the Council. We suggest you to use `'2F_(1)'` instead of `'1F_(1)'`.
Copy the diagram and by using three standard rays starting from point A, obtain an image of the object AB.

Explanation

`A_(1)B_(1)` is the image formed.