Question

a) An object 2 cm tall stands on the principal axis of a converging lens of focal length 8 cm. Find the position, nature and size of the image formed if the object is:
i) 12 cm from the lens
ii) 6 cm from the lens.
b) State one parallel application each of the use of such a lens with the object in position i) and ii)

Answer 1

a) (i) `v=+24 cm`, The image is 24 cm in front of the lens, Virtual and erect , 8 cm b) i) Used in film projector ii) Used as a magnifying glass