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AP Physics 2
13.2 Images Formed by Mirrors
IntermediateMCQConceptual22k
A horizontal dashed line representing the principal axis passes through the center of a concave mirror oriented vertically and curving toward the left. On the axis, a small dot labeled S marks the focal point F of the mirror. Exactly four straight solid lines with arrowheads originate from point S and diverge outward, terminating at different locations along the concave reflecting surface. At each termination point on the mirror, a reflected ray extends horizontally toward the left. No other labels, lines, text, or axes appear.
Light rays originating from a source at focal point F reflecting off a concave mirror.
A point light source is placed at the focal point \(F\) of a concave mirror in an attempt to create a collimated beam of light where all reflected rays travel parallel to the principal axis. An optics student compares two mirror geometries: a parabolic mirror and a spherical mirror of large aperture. Which mirror shape reliably produces a perfectly parallel beam for all rays originating from \(F\), and why?

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