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AP Physics 2
13.1 Reflection
BeginnerMCQConceptual15.5k
A horizontal line represents a flat plane mirror with hatching underneath indicating the non-reflective side. A vertical dashed line perpendicular to the mirror surface represents the normal at the point of incidence. A solid line with an arrow pointing toward the point of incidence represents the incident ray. The incident ray comes from the upper left and hits the mirror surface where the normal intersects it. An arc and text label indicate that the angle between the incident ray and the horizontal mirror surface is 30^\circ. No reflected ray is shown. No other labels, lines, text, or axes appear.
Incident ray striking a plane mirror.
A narrow laser beam strikes a flat plane mirror such that the incident ray makes an angle of \(30^\circ\) with the mirror surface, as shown in the diagram. Which of the following correctly states the angle of reflection measured relative to the surface normal, and provides the correct physical justification?

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