6 The focal length of lens of a camera is 5 cm The distance

Last updated: 6/14/2023

6 The focal length of lens of a camera is 5 cm The distance of the lens from the photographic plate can be changed to obtain the image on the plate of the objects at different dis tances Find the range through which the lens has to move in order to bring objects into focus at distances beyond 20 5 cm cm from the plate