Question

The focal length of ............... lens is positive
a. Concave
b. Bifocal
c. Convex
d. Double Concave​

Answer 1

Answer:

c. convex

Explanation:

A positive focal length means that the focal point of the lens is on the other side of the lens from where the object is placed. On the other hand, a negative focal length means that the focal point is on the same side of the lens as where the object is placed.

hope it will help you

please mark me as brainest