Self-portrait in the mirror, mobile phone crooked, P

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A mirror is an object with a smooth surface and can reflect light. The most common mirror is a flat mirror, which people often use to tidy up their appearance. In science, mirrors are often used in telescopes, lasers, industrial instruments and other instruments. In 3000 BC, Egypt had bronze mirrors for makeup; 1 century, large mirrors that can reflect the whole body began to appear; What was popular in the Middle Ages was a small portable mirror with a comb in an ivory or precious metal box. From the end of 12 to the beginning of 13, glass mirrors with silver back or iron back appeared; During the Renaissance, Venice was the center of mirror making, and the mirrors produced were famous for their high quality.