Who invented periscope and when ?
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Explanation:
Hippolyte Marié-Davy
In 1854, Hippolyte Marié-Davy invented the first naval periscope, consisting of a vertical tube with two small mirrors fixed at each end at 45°. Simon Lake used periscopes in his submarines in 1902.
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Answer:
Hippolyte Maria-Davy invented periscope
He invented it in 1854
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