Find distanace of image from a convex lens of focal length
`20cm` if object is placed at a distance of `30cm` from the lens. Also find its
magnification.

A concave lens of focal length 20 cm is placed at a distance of 35 cm from an object. Find the position of the image and its magnification.

An object is placed at a distance of 30 cm from a convex lens of focal length 20 cm.

Find the position, nature and size of the image formed by a convex lens of focal length 20 cm of an object 4 cm high placed at a distance of 30cm from it.

A real image is obtained at 30 cm from a convex lens of focal length 7.5 cm . Find the distance of the object from the lens .

A convex lens of focal length 15 cm is placed on a plane mirror. An object is placed at 30 cm from the lens. The image is

A convex lens of focal length 15 cm is placed on a plane mirror. An object is placed at 30 cm from the lens. The image is

A real image is obtained at 30 cm from a convex lens of focal length 7.5 cm .Find the distance of the object from tne lens .

The focal length of convex lens is 20 cm. If an object of height 4 cm is placed at a distance of 30 cm from the lens, find: The magnification produced by the lens.