A concave mirror forms an inverted image on a screen in front of it

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

Problem

A concave mirror forms an inverted image on a screen

70\,\text{cm}

in front of it. The image is three times the size of the object. What is the radius of curvature of the mirror (use sign convention)? (a)

+35\,\text{cm}

(b)

-35\,\text{cm}

(c)

-17.5\,\text{cm}

(d)

+17.5\,\text{cm}