Physics

Problem

An object is placed

0.25\,\text{m}

in front of a concave lens and a virtual image is formed

0.10\,\text{m}

from the lens on the same side as the object. Determine the focal length

f

of the lens (answer in centimetres). a)

+16.7\,\text{cm}

-7.1\,\text{cm}

-16.7\,\text{cm}

-10\,\text{cm}