Question

Focal length of a convex mirror whose radius of curvature 40 cm is​

Answer 1

Answer:

R = 2f

40 = 2f

f = 40÷2

f = 20....

Explanation:

I hope it helps u

Answer 2

ANSWER:

The focal length of convex mirror with radius of curvature as 40 cm is 20 cm.

EXPLANATION:

   The focal length is the distance of the focal point or the point at which the parallel light beams converge also known as focus point from the mirror or lens. The "convex mirror" is one of the two types of mirrors present. The convex mirrors are used to converge a set of parallel beams of light to form an image at the focal point. For convex mirror, the focal length is determined as the half of the "radius of curvature" of the mirror. The focal length is represented as f and radius of curvature is generally represented as R. As the "radius of curvature" is given as 40 cm, the "focal length" of the convex mirror will be  

$f=\frac{R}{2}=\frac{40}{2}=20 \mathrm{cm}$

Thus the "focal length" of convex mirror with radius of curvature as 40 cm is 20 cm.