Cathode Ray

Cathode Ray

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This image is part of the sequence science: cathode rays deflected by magnetic field


Caption: Cathode rays (also called an electron beam or e-beam) are streams of electrons observed in vacuum tubes, i.e. evacuated glass tubes that are equipped with at least two metal electrodes to which a voltage is applied, a cathode or negative electrode and an anode or positive electrode. Although cathode rays themselves are invisible, they cause a phosphorescent screen to glow when they strike it - making it possible for us to see their path. Cathode rays are deflected by a magnet, indicating that they are electrically charged.

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Keywords: beam, bent, cathode, cathode ray tube, chemistry, crt, demonstration, e-beam, educational, electron, electron beam, magnet, ray

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