Question

ii) A convergent lens has a focal length of 20 cm. At what distance should an object of height
4 cm from the optical centre of the lens be placed so that its image is formed 10 cm away
from the lens. Find the size of the image also.
iii) Draw the ray diagram to show the formation of image in above situation.​

Answer 1

Step-by-step explanation:

By lens formula; ⇒ u = -60cm. Therefore, object is placed at 60 cm in front of lens. Height of image is 1.25 cm.