An object is placed in front of a concave mirror of focal length

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

Problem

An object is placed

40\,\text{cm}

in front of a concave mirror of focal length

20\,\text{cm}

. Using the Cartesian sign convention, the image distance

v

is: (a)

+\dfrac{40}{3}\,\text{cm}

(b)

-40\,\text{cm}

(c)

+40\,\text{cm}

(d)

-20\,\text{cm}