Cathode ray - Wikipedia
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 ...
J. J. Thomson - Wikipedia
Thomson made his suggestion on 30 April 1897 following his discovery that cathode rays (at the time known as Lenard rays) could travel much further through air than expected for an atom-sized particle. [29]
Definition and History of Cathode Ray - ThoughtCo
2018年4月16日 · Johann Hittorf discovered cathode rays in 1869 using a Crookes tube and noting shadows cast on the glowing wall of the tube opposite of the cathode. In 1897 J. J. Thomson discovered that the mass of the particles in cathode rays was 1800 times lighter than hydrogen, the lightest element.
Cathode Ray Experiment by JJ.Thomson (CRT) - Explanation
The Cathode ray experiment was a result of English physicists named J. J. Thomson experimenting with cathode ray tubes. During his experiment he discovered electrons and it is one of the most important discoveries in the history of physics.
J. J. Thomson - Cathode Rays - Discovery of the Electron (1897)
English physicist who investigated what were known as cathode rays, and discovered the electron (1897) and received the 1906 Nobel Prize for Physics.
J.J. Thomson - Biography, Nobel Prize, Facts, Theories, Inventions
2024年7月3日 · J.J. Thomson, born Joseph John Thomson in 1856, was a British physicist renowned for his discovery of the electron in 1897. Working at the Cavendish Laboratory at the University of Cambridge, Thomson demonstrated through his experiments with cathode rays that atoms are not indivisible as previously thought, but contain smaller particles.
Discovery of the Electron: J. J. Thomson - Le Moyne
They were called cathode rays because they were emitted from the cathode of the vacuum tube. The term cathode ray is obsolete; today the rays would be described as a beam of electrons. See Anderson 1964 or Pais 1986 for detailed chronologies of cathode ray research.
October 1897: The Discovery of the Electron - American …
J.J. Thomson refined previous experiments and designed new ones in his quest to uncover the true nature of these mysterious cathode rays. Three of his experiments proved especially conclusive.
J.J. Thomson - Experiment, Theory & Life - Biography
2014年4月2日 · In 1894, Thomson began studying cathode rays, which are glowing beams of light that follow an electrical discharge in a high-vacuum tube.
Atom - Electrons, Protons, Neutrons | Britannica
2024年12月11日 · Plücker discovered cathode rays in 1858 by sealing two electrodes inside the tube, evacuating the air, and forcing electric current between the electrodes. He found a green glow on the wall of his glass tube and attributed it to rays emanating from the cathode.