usage of spherical mirrors in human civilization
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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
physicist Ibn Sahl in the 10th century, and Ibn
al-Haytham discussed concave and convex mirrors in
both cylindrical and spherical geometries, carried out a
number of experiments with mirrors, and solved the problem of finding the point
on a convex mirror at which a ray coming from one point is reflected to another
point. However Archimedes was charged of inventing spherical mirrors which would focus sun rays on ships and burn them.
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