what is the function of a periscope in a submarine
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periscopes are used in submarines to see ships on the surface of the water when the submarine is under water
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Submarines have periscopes so that people inside can what is on the surface of the water. A periscope is a useful example of the law of reflection at work. It's important that your mirrors are placed at a 45° angle, because light always reflects away from a mirror at the same angle that it hits it.
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