# Which of the following statements is true?

+1 vote
296 views
in Physics
(a) A convex lens has 4 dioptre power having a focal length 0.25 m
(b) A convex lens has –4 dioptre power having a focal length 0.25 m
(c) A concave lens has 4 dioptre power having a focal length 0.25 m
(d) A concave lens has –4 dioptre power having a focal length 0.25 m

+1 vote
by (256k points)
selected

(a) A convex lens has 4 dioptre power having a focal length 0.25 m