Question

Calculate the Focal Length of a convex
mirror whose radius of curvature is 36 cm: (a) 12 cm (b) 18 cm (c) 72 cm (d) 9 cm folens is -20 What will be its focal length ?​

Answer 1

Answer:

its focal lenth is 18 cm

Explanation:

1. $36 \2 = 18$

Answer 2

Answer:

B 18 cm

Explanation:

Focal length=Radius of curvature/2

=36/2

=18