Cathode-ray Oscilloscope | Instrument - Britannica

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cathode rays

• In cathode ray

  …fields, gives rise to the cathode-ray oscilloscope (cathode-ray tube [CRT]) for monitoring variations and values of an alternating voltage or current and to the picture tube of television and radar.

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cathodoluminescence

• In luminescence: Electroluminescence

  …the viewing screen of an oscilloscope tube constructed in 1897; similar screens, employing improved crystal phosphors, are used in television, radar, oscilloscopes, and electron microscopes.

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history of flight

• In history of flight: Avionics, passenger support, and safety

  The advent of the cathode-ray oscilloscope and its application to aircraft spurred the avionics revolution, which had begun with relatively primitive radios. While the initial uses of the cathode-ray display were for military purposes (detecting incoming enemy aircraft), it was soon applied to in-flight navigation, controlling aircraft in terminal…

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oscilloscopes

• In oscilloscope

  Ferdinand Braun developed the first cathode-ray oscilloscope in 1897.

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work of Braun

• In Ferdinand Braun

  He demonstrated the first oscilloscope (Braun tube) in 1897, after work on high-frequency alternating currents. Cathode-ray tubes had previously been characterized by uncontrolled rays; Braun succeeded in producing a narrow stream of electrons, guided by means of alternating voltage, that could trace patterns on a fluorescent screen. This invention,…

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