Question

The focal length of convex mirror having radius of curvature 36 cm is ___.

Answer 1

1. The radius of curvature of a convex mirror is 36 cm.
2. The relation between the radius of curvature and the focal length is given by $f=\frac{R}{2}$.
3. Substituting the known values,

$\begin{array}{rcl}f& =& \frac{R}{2}\\ & =& \frac{36}{2}\\ & =& 18\text{cm}\end{array}$

Thus, the focal length of the convex mirror having a radius of curvature of 36 cm is 18 cm.