A mirror produces an upright image that is one-third the height of the object when…

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

Problem

A mirror produces an upright image that is one-third the height of the object when the object is placed

12\,\text{cm}

in front of the mirror. What is the focal length of the mirror? (a)

+3\,\text{cm}

(b)

-6\,\text{cm}

(c)

+6\,\text{cm}

(d)

-8\,\text{cm}