A pin of height 2 cm is placed on the principal axis of a converging lens. An inverted image of size 1 cm is formed at a distance of 40 cm from the lens. Find the focal length of the lens and the distance of the pin from the lens.

An object of size 5 cm is placed at distance of 25 cm in front of a convex lens of focal length 20 cm. Find the size and nature of image and its distance from the lens.

An object of size 10 cm is placed at distance of 20 cm in front of aconcave lens of focal length 20 cm. Find the size and nature of image. Also find distance of image from the lens

An object of 3 cm height is placed at a distance of 60 cm from a convex mirror of focal length 30 cm.Find the position and size of the image formed.

If the focal length of a converging lens is 50 cm. What is the power of the Lens ?

An object is placed at a distance 5 cm from a convex lens of focal lenth 10 cm.Calculate the position nd magnifiation of the image.

The graph between object distance u and image distance v for a lens is given below. The focal length of the lens is. .

Draw a ray diagram to show how the image is formed when the object is placed between f and 2 f distances from a convex lens.Deduce the relation between the distances of he oject and the image from the lens and the focal length of the lens under this condition.