Question

Focal length of a convex mirror whole radius of curvature is 40cm

Answer 1

Answer:

focal length = 20 cm

Explanation:

radius of curvature

focal length = _____________

2

40

=------------------=20cm

2

Answer 2

Answer:

$Focal \: length \: = \: \frac{Radius \: of \: curvature}{2} \\ or \: f = \frac{r}{2} \\ \\ f \: = \: \frac{40}{2} \\ \\ f = 20cm \\ \\ Thus, \: the \: focal \: length \: of \: convex \: mirror \: is \: 20cm.$