Text: Corner receivers from corners of cubes. See Trihedral Corner For example, metallic corner reflectors on boats are designed to enhance their radar cross- section so they can be more easily seen and avoided by other ships at sea. Corner reflectors comprise three flat mirrors that make a corner at right angles, so that the reflected ray retraces the path of the incident ray (because of geometry and the fact that the angle of incidence equals the angle of reflection).

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