The focal length of concave lens is 25 cm. Then its power will be
(a)	4 D	(b)	-4	(c)	-4 D	(d)	All of these

Question ID - 100084 | SaraNextGen Top Answer

The focal length of concave lens is 25 cm. Then its power will be
(a)	4 D	(b)	-4	(c)	-4 D	(d)	All of these