Cathode Ray

Cathode Ray

Cathode rays (also called an electron beam or e-beam) are streams of electrons observed in vacuum tubes. If an evacuated glass tube is equipped with two electrodes and a voltage is applied, the glass opposite of the negative electrode is observed to glow, due to electrons emitted from and travelling perpendicular to the cathode (the electrode connected to the negative terminal of the voltage supply). They were first observed in 1869 by German physicist Johann Hittorf, and were named in 1876 by Eugen Goldstein kathodenstrahlen, or cathode rays.

Electrons were first discovered as the constituents of cathode rays. In 1897 British physicist J. J. Thomson showed the rays were composed of a previously unknown negatively charged particle, which was later named the electron. Cathode ray tubes (CRTs) using a focused beam of electrons deflected by electric or magnetic fields, create the image in a classic television set.

Read more about Cathode Ray:  Description, History, Properties of Cathode Rays

Other articles related to "cathode ray, ray, rays, cathode rays":

Timeline Of Chemistry - 19th Century
1885 Eugene Goldstein names the cathode ray, later discovered to be composed of electrons, and the canal ray, later discovered to be positive hydrogen ions that had been stripped of their electrons in a ... Thomson discovers the electron using the cathode ray tube. 1898 Wilhelm Wien demonstrates that canal rays (streams of positive ions) can be deflected by magnetic fields, and that the amount of deflection is proportional to the mass-to-charge ratio ...
A.C. Cossor - Company Timeline
... Early examples of X-ray tubes are produced for the scientists William Crookes and Oliver Lodge. 1932 The company introduces its first cathode ray oscilloscope. 1935 A Cossor cathode ray tube is used in the receiver of the Daventry Experiment for radar research, conducted to investigate the signals produced by reflections off a Heyford bomber of the output of the BBC ...
Large-screen Television Technology
... have almost completely displaced cathode ray tubes (CRT) in television sales, due to the necessary bulkiness of cathode ray tubes ... to about 40 inches because of the size requirements of the cathode ray tube, which fires three beams of electrons onto the screen, creating a viewable ...
Video Camera Tube
... The most commercially successful of these tubes were various types of cathode ray tubes or "CRTs" ... Any vacuum tube which operates using a focused beam of electrons ("cathode rays") is known as a cathode ray tube ... term for this type of display tube is kinescope, only one of many types of cathode ray tubes ...
Properties of Cathode Rays
... Like a wave, cathode rays travel in straight lines, and produce a shadow when obstructed by object ... Ernest Rutherford demonstrated that rays could pass through thin metal foils, behavior expected of a particle ... an electric field was used to deflect the rays by J ...

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