Calculate the position of the image of an object when placed at
(a) focus of a convex lens.
(b) focus of a convex lens.

Calculate the position of the image of an object when placed at (a) focus of a convex lens. (b) focus of a concave lens.

The nature and size of an object placed focus F_(1) of a convex lens is :

If an object is placed at the focus of a convex lens, where is the image formed?

Draw a ray diagram to show the formation of the image of an object placed between the optical centre and focus of a convex lens. Deduce the relationship between object distance, image disatnce and focal length of lens.

Principal focus of convex lens:

Principal focus of convex lens:

An object is placed at the focus of a concave lens. Where will be image ?