An object is placed at a distance of 1.5 m from a screen and a convex lens is interosed between them .the magnification produced is 4.What is the focal length of the lens?

An object is placed at a distance of f//2 from a convex lens .The image will be

An object is placed at a distance of 75 cm from a screen .Where should a convex lens of focal length 12 cm be placed so as to obtain on the screen?

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.

When an object is placed at a distance of 60 cm from a convex spherical mirror, the magnification produced is 1//2 .Where should the object be placed to get a magnification of 1//3 ?

An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the position and nature of the image

An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the position and nature of the image

A screen is placed 90cm from an object. The image of the object on the screen is formed by a convex lens at two different locations separated by 20cm. Determine the focal length of the lens.

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.