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AP Physics 2
13.3 Refraction
IntermediateMCQMathematicalConceptual13.3k
A schematic of a triangular glass prism surrounded by air. The prism has a vertical left face and a straight slanted right face that meets the left face at a top vertex with a small apex angle labeled A. A single horizontal ray of light, represented by a solid line with a rightward arrowhead, enters the left face perpendicular to the surface. The ray continues in a straight horizontal line through the interior of the glass prism until it reaches the slanted right face. A dashed line normal to the slanted face is drawn at the point of incidence on the inner boundary. No exiting ray or deviation angle is shown. No other labels, lines, text, or axes appear.
Light ray entering a glass prism with apex angle \(A\).
A monochromatic light ray in air is incident normally on the first face of a thin glass prism of index of refraction \(n\) and small apex angle \(A\). The ray passes through the prism and refracts as it emerges into air from the second face. Assuming the small-angle approximation \(\sin\theta \approx \theta\) applies, which of the following correctly pairs the expression for the total angle of deviation \(\delta\) of the ray with the color of visible light that experiences the greater deviation?

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