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A beam of cathode rays in a vacuum tube bent into a circle by a magnetic field generated by a Helmholtz coil. Cathode rays are normally invisible; in this demonstration Teltron tube, enough gas has been left in the tube for the gas atoms to luminesce when struck by the fast-moving electrons.
Cathode rays or electron beams (e-beam) are streams of electrons observed in discharge tubes. If an evacuated glass tube is equipped with two electrodes and a voltage is applied, glass behind the positive electrode is observed to glow, due to electrons emitted from the cathode (the electrode connected to the negative terminal of the voltage supply). They were first observed in 1859 by German physicist Julius Plücker and Johann Wilhelm Hittorf,[1] and were named in 1876 by Eugen Goldstein Kathodenstrahlen, or cathode rays.[2][3] In 1897, British physicist J. J. Thomson showed that cathode rays were composed of a previously unknown negatively charged particle, which was later named the electron. Cathode-ray tubes (CRTs) use a focused beam of electrons deflected by electric or magnetic fields to render an image on a screen.
^Martin, Andre (1986), "Cathode Ray Tubes for Industrial and Military Applications", in Hawkes, Peter (ed.), Advances in Electronics and Electron Physics, Volume 67, Academic Press, p. 183, ISBN 9780080577333, Evidence for the existence of "cathode-rays" was first found by Plücker and Hittorf ...
^E. Goldstein (May 4, 1876) "Vorläufige Mittheilungen über elektrische Entladungen in verdünnten Gasen" (Preliminary communications on electric discharges in rarefied gases), Monatsberichte der Königlich Preussischen Akademie der Wissenschaften zu Berlin (Monthly Reports of the Royal Prussian Academy of Science in Berlin), 279-295. From page 286: "13. Das durch die Kathodenstrahlen in der Wand hervorgerufene Phosphorescenzlicht ist höchst selten von gleichförmiger Intensität auf der von ihm bedeckten Fläche, und zeigt oft sehr barocke Muster." (13. The phosphorescent light that's produced in the wall by the cathode rays is very rarely of uniform intensity on the surface that it covers, and [it] often shows very baroque patterns.)
^Joseph F. Keithley The story of electrical and magnetic measurements: from 500 B.C. to the 1940s John Wiley and Sons, 1999 ISBN 0-7803-1193-0, page 205
Cathoderays or electron beams (e-beam) are streams of electrons observed in discharge tubes. If an evacuated glass tube is equipped with two electrodes...
frequency response, and were superseded by the oscilloscope which used a cathoderay tube (CRT) as its display element. The Braun tube, forerunner of the...
A cathode is the electrode from which a conventional current leaves a polarized electrical device. This definition can be recalled by using the mnemonic...
thermionic tubes were being replaced by the transistor. However, the cathode-ray tube (CRT) remained the basis for television monitors and oscilloscopes...
English physicist William Crookes and others around 1869-1875, in which cathoderays, streams of electrons, were discovered. Developed from the earlier Geissler...
Video camera tubes were devices based on the cathode-ray tube that were used in television cameras to capture television images, prior to the introduction...
these positive rays Kanalstrahlen, "channel rays", or "canal rays", because these rays passed through the holes or channels in the cathode. The process...
In vacuum tubes and gas-filled tubes, a hot cathode or thermionic cathode is a cathode electrode which is heated to make it emit electrons due to thermionic...
cathodoluminescent substances which glow when struck by an electron beam (cathoderays) in a cathode-ray tube. When a phosphor is exposed to radiation, the orbital electrons...
electron beam that has a precise kinetic energy. The largest use is in cathode-ray tubes (CRTs), used in older television sets, computer displays and oscilloscopes...
The CathodeRay are a Scottish alternative band based in Edinburgh, Scotland. The current line-up is Jeremy Thoms (lead vocals/guitar/keyboards), Steve...
replaced CCFL backlit LCDs. Before the mid-2000s, most monitors used a cathode-ray tube (CRT) as the image output technology. A monitor is typically connected...
Zworykin's words, "very crude images" over wires to the "Braun tube" (cathode-ray tube or "CRT") in the receiver. Moving images were not possible because...
developed for mechanical television systems, which were quickly replaced by cathode-ray tube (CRT) systems, which, in turn, were replaced by flat-panel displays...
emission of electrons. Early cold-cathode devices included the Geissler tube and Plucker tube, and early cathode-ray tubes. Study of the phenomena in these...
thermionic emission. This effect forms the basis for the vacuum tube and the cathoderay tube. approximately 1893: The selenium phototube invention allows the...
the phosphor, causing the phosphor to give off photons, much like the cathode-ray tube in a television. The illumination requires no external power, and...
definition of "video game" used. Following the 1947 invention of the cathode-ray tube amusement device—the earliest known interactive electronic game...
preferred type for most industrial applications. Instead of storage-type cathoderay tubes, DSOs use digital memory, which can store data as long as required...
world's households owned a television set. The replacement of earlier cathode-ray tube (CRT) screen displays with compact, energy-efficient, flat-panel...
deflection of "cathoderays" due to a known magnetic field in a cathoderay tube. Seven years later J. J. Thomson showed that cathoderays consist of streams...
trade name for a water-based colloidal graphite coating commonly used in cathoderay tubes (CRTs). It is manufactured by Acheson Industries, a subsidiary...
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