Question

What is the focal length of concave and convex lens?

Answer 1

Answer:

Hey mate the focal length of concave mirror is real but a convex mirror has a virtual focal lenghth bcz It's focus is also virtual.

MARK AS BRAINLIST.....

Answer 2

$\huge \orange {\mathbb {Focal length}}$ Focal length is distance over which the parallel rays either converge or diverge

▶️For convex lens the focal length is positive. On the other hand, the focal length of concave lens is negative.

▶️Thus, for convex lens, the focal length is a distance over which all the parallel rays will converge.