Question

The focal length of the convex lens is ___
( +/-) ​

Answer 1

$\large\bold\orange{\underline{Answer:-}}$

Focal length of convex lens is positive (+)...

Answer 2

The focal length convex length is positive.beacuse a convex lens is a converging lens. In a convex lens, the rays of light traveling parallel to the principal axis actually converge at a point, the focus is called the real focus. Hence, its focal length is taken as positive.

i hope it will help you.