In the following diagram are shown the position of an object O, image I and two lenses. The focal length of one lens is also given. Determine the focal length of the other lens.

In the following ray diagram are given the position of an object O, image I and two lenses L_(1) and L_(2) . The focal length of L_(1) is also given. Find the focal length of L_(2) .

The focal length of …………...lens is positive.

The focal length of a ……………... lens is positive.

In the following ray diagram the positions of an object O, image I and two lenses L_(1) and L_(2) and a mirror M are given. The focal length of L_(1) is 10 cm. Find the focal length of L_(2) .

Two thin lenses of focal length f_1 and f_2 are placed in contant .The focal length of the composite lens will be

Graph of position of image vs position of point object from a convex lens is shown. Then, focal length of the lens is

Graph of position of image vs position of point object from a convex lens is shown. Then, focal length of the lens is

Graph of position of image vs position of point object from a convex lens is shown. Then, focal length of the lens is