A vertical plane mirror coincides with the -axis on a coordinate grid

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

Problem

A vertical plane mirror coincides with the yy-axis on a coordinate grid. A point source of light is placed at (−4 cm, 2 cm)(-4\,\text{cm},\,2\,\text{cm}). What are the coordinates of its image formed by the mirror? (a) (4 cm, −2 cm)(4\,\text{cm},\,-2\,\text{cm}) (b) (0 cm, 2 cm)(0\,\text{cm},\,2\,\text{cm}) (c) (4 cm, 2 cm)(4\,\text{cm},\,2\,\text{cm}) (d) (−4 cm, −2 cm)(-4\,\text{cm},\,-2\,\text{cm})

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