Optics

Lens magnification

Problem by zainul abidin
30 Nov 1999 00:00 WIB
A lens has a focal length of 20 cm. (a) How far from the lens is the image when the object distance (1) infinite (2) 100 cm (3) 40 cm (4) 20 cm. (b) Calculate the linear magnification in (a) for (2) and (3)