Question

history of spherical mirrors in human civilization

Answer 1

parabolic mirrors were described and studied in classical antiquity by the mathematician diocles in his work on burning mirror.

By 11th CE clear glass mirrors were being produced in Moorish Spain
obsidian mirrors came in to existence followed by metal coated glass mirrors this led to discovery of metal coated spherical or parabolic mirrors.

A spherical mirror is a mirror which has the shape of a piece cut out of a spherical surface

Ptolemy also carried out experiments with curved polished iron mirrors and discussed about convex spherical and concave spherical mirrors in his book optics