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A diagram showing a Crookes tube connected to a high voltage supply. The Maltese cross has no external electrical connection. Cathode rays are so named because they are emitted by the negative electrode, or cathode, in a vacuum tube.
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English: Diagram of JJ Thomson's experiment with cathode rays. Cathode rays (blue) emitted by the cathode on the left were defelcted by an electric field (yellow) in the center. Cathode rays (blue) emitted by the cathode on the left were defelcted by an electric field (yellow) in the center.
Electrons (cathode rays) released from the cathode plate are accelerated down the tube to the left toward the anode, and strike the end wall, which fluoresces. The Maltese cross shaped anode blocks the electrons, casting a shadow on the glowing end wall, demonstrating that the cathode rays travel in straight lines.
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Schematic symbol used in circuit diagrams for a vacuum tube, showing control grid. The control grid is an electrode used in amplifying thermionic valves (vacuum tubes) such as the triode, tetrode and pentode, used to control the flow of electrons from the cathode to the anode (plate) electrode. The control grid usually consists of a cylindrical ...
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In 1947, the cathode-ray tube amusement device, the earliest known interactive electronic game as well as the first to incorporate a cathode-ray tube screen, was created. [ 34 ] From 1949 to the early 1960s, there was a shift from circular CRTs to rectangular CRTs, although the first rectangular CRTs were made in 1938 by Telefunken.