Question

(i) The magnification of an image formed by a lens is -1. If the
distance of the image from the optic centre of the lens is 25 cm,
(a) where is the object placed?
(b) find the nature and focal length of the lens.
(ii) If the object is placed at 15 cm from the optic centre of the
lens, where would the image be formed? Draw a diagram to
justify your answer.​

Answer 1

If the

distance of the image from the optic  of the lens is 25 cm,

(a) where is the object placed?

(b) find the nature and focal length of the lens.

(ii) If the object is placed at 15 cm from the optic  of the

lens, where would the image be formed? Draw a diagram to

justify your answer.​