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Theoretical overview demonstrates how specular light reflection probes material interfaces, suggesting broad utility for non-destructive surface characterization.
Reflection of light is a surface phenomenon—it is strongly dependent on the nature of the surface and can therefore be used to study surfaces. If the surface is flat and smooth, the nature of the reflection is called specular, i.e., mirrorlike, and obeys the simple law that the angle of incidence equals the angle of reflection.
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Harrick et al. (1968) studied this question.
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