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Earliest manufactured mirrors were the polished stones.
Ptolemy conducted a no of experiments and discussed about plane mirrors, convex mirrors and concave mirrors in his optics.
in 500 ad people of china began making mirrors with the help of silver mercury.
venice which is known for glass making expertise became a centre of mirror production in 16th century.
german chemist justus von liebig invented silvered glass mirrors in 1835.

Hope dis helps u.. :)

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