A car’s side-view mirror is a convex spherical mirror

PHYSICS · Single correct · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction

Problem

A car’s side-view mirror is a convex spherical mirror. When a traffic sign is

20\,\text{cm}

in front of the mirror, its virtual image appears

8\,\text{cm}

behind the mirror. What is the mirror’s radius of curvature? (a)

+26.7\,\text{cm}

(b)

-13.3\,\text{cm}

(c)

-26.7\,\text{cm}

(d)

+11.4\,\text{cm}