# Which of the following statements is true?  (a) A convex lens has 4 dioptre power having

24.6k views
in Physics

Which of the following statements is true?

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

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

(c) A concave lens has 4 dioptre power having a focal length of 0.25 m

(d) A concave lens has –4 dioptre power having a focal length of 0.25 m

+1 vote
by (48.2k points)
selected by

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

Positive value for focal length indicates convex lens.