Question

The focal length of a convex mirror is half of its _________ of curvature

Answer 1

1. The radius of the sphere out of which the mirror is made is called the radius of curvature.
2. The focus of the concave mirror is the point where parallel rays from infinity meet.
3. The relation between the focus(F) and radius of curvature (R) is :$F=\frac{R}{2}$

Thus, the focal length of a convex mirror is half of its radius of curvature