Question

The focal length of a lens is +0.50 m. The power of the lens and type
(BL +2.0 D and concave lens
A + 2.0 D and convex lens
(D) -2,0 D and convex lens
C) -2.0 D and concave lens​

Answer 1

Answer:

answer is

2.0D and convex lens

as positive sign shows it is convex and

p=1/f

p=1/0.5

p=2