Physics

Problem

A concave mirror produces a real image that is twice the height of the object. The image forms

50\,\text{cm}

in front of the mirror along the principal axis. What is the focal length of the mirror? a)

f = -16.7\,\text{cm}

f = +25\,\text{cm}

f = +16.7\,\text{cm}

f = +33.3\,\text{cm}