An object is located in front of a thin lens

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Geometric Optics · Geometric Optics

Problem

An object is located

12\,\text{cm}

in front of a thin lens. The lens forms a virtual, upright image that appears

18\,\text{cm}

from the lens on the same side as the object. Determine the focal length of the lens. (a)

+7.2\,\text{cm}

(b)

+36\,\text{cm}

(c)

-36\,\text{cm}

(d)

+18\,\text{cm}