A lens of focal length 20 cm is used to produce a ten times magnified image of a film slide on a screen. How far must the slide be placed from the lens?

A converging lens of focal length 5 cm is placed at a distance of 20 cm from a screen. How far from the lens should an object be placed so as to form its real image on the screen?

A convex lens of focal lengths 30 cm produces 5 times magnified real image of an object What is the object distance ?

A convex lens of focal length 30 cm produces 5 times magnified real image of an object. What is the object distance?

A convex lens of focal length 30 cm produces 5 times magnified real image of an object. What is the object distance?

A convex lens of focal length 20 cm is placed at a distance of 24 cm from the screen how far from the lens should an object be placed so as to from a real image on the screen. Also find the nature and magnification of the image produced.

A projector lens has a focal length of 10 cm. It produces a real image of a 2cm xx 2 cm slide on a screen 5 metre from the lens. What is the size of the picture on the screen ?

(i) A diverging lens of focal length 15 cm, forms an image at distance of 10 cm from the lens. How far is the object placed from the lens ? (ii) What is the linear magnification of the image?

A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens ?

A lens with a focal length of 25 cm produces real image of an object at a distance of 50 cm from the lens. At what distance the object placed from the lens?