The radius of curvature of a spherical convex mirror is 52 cm.What is its focal length?
A)+26 cm
B)-26 cm
C)+52 cm
D)-52 cm
E)+104 cm

Question

Quizplus · Accepted Answer

For a spherical convex mirror, the focal length is half of the radius of curvature, but it is negative as the mirror reflects light outwards. Therefore, the focal length of the given mirror is f=−52/2=−26 cm. So the best choice is option B.

The Radius of Curvature of a Spherical Convex Mirror Is