A thin concave lens has focal length

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

Problem

A thin concave lens has focal length 15 cm15\,\text{cm}. An object is placed 30 cm30\,\text{cm} in front of the lens. The image distance vv measured from the lens is (a) +30 cm+30\,\text{cm} (b) −10 cm-10\,\text{cm} (c) −15 cm-15\,\text{cm} (d) −30 cm-30\,\text{cm}

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