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The History of X-rays
A Bavarian physicist named Wilhelm Conrad Roentgen discovered x rays. He was working with some sealed glass vacuum tubes that contained a cathode and an anode. During his experiments, he applied voltage to these tubes and noticed that a screen near the tubes was glowing. He blocked the path of these newfound rays to see what would prevent the screen from glowing. When he placed his own hand there, he could see the outline of his bones on the screen. This historic discovery on November 8, 1895 dramatically changed diagnostic procedures for both medicine and dentistry.
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