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After that, the mirror began to be accepted and entered people’s lives. The land epcot poster. Even so, up to the 16th century, mirrors were still considered by some to be related to witchcraft and paranormal rituals. 200 years later in the 16th century, a number of Spanish and French spies used mirrors to encode and decode messages using a mirror cipher system invented by Leonardo da Vinci in the 15th century. The mirror again became an important part of the invention of the periscope. The glasses were used in espionage operations during the war to send confidential information without using people.
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