A lens has a power of +0.5D. It is:

Q. A lens has a power of +0.5D. It is:

A.            A concave lens of local length 5 m

B.            A convex lens of focal length 2 m

C.            A convex lens of focal length 5 m

D.            A concave lens of focal length 2 m

 Answer: A convex lens of focal length 2 m