Cathode rays were discovered by Julius Plücker and Johann Wilhelm Hittorf. By placing a charge across a glass tube with a vacuum inside and a phosphor coating outside, it was possible to get a bright glow. Electron travels in straight lines and leave shadows. If the cathode rays hit a paddle with a phosphor coating, it would force the paddle to move signifying that cathode rays are particles (1 янв 1803 г. – 1 янв 1900 г.)
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1 янв 1803 г.
1 янв 1900 г.
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