Question

8.
Focal length of a concave lens is 10 cm. Where
should a real object be placed in front of it so that an image of magnification 1/4 is formed?


(1) 15 cm
(2) 30 cm
(3) 20 cm
(4) 7.5 cm
​

Answer 1

Explanation:

options 2 is the correct answer