Mirror
Burning mirrors

The Greek in Classical Antiquity were familiar with the use of mirrors to concentrate light. Parabolic mirrors were described and studied by the mathematician Diocles in his work On Burning Mirrors. Ptolemy conducted a number of experiments with curved polished iron mirrors, and discussed plane, convex spherical, and concave spherical mirrors in his Optics.

Parabolic mirrors were also described by the Caliphate mathematician Ibn Sahl in the tenth century.
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