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84 years

    J. J. Thomson, Discovers the Electron, 1897  new window
In 1897 in Cambridge, J J Thomson experimented on cathode rays. In Britain, physicists had argued these rays were particles, but German physicists disagreed, thinking they were a type of electromagnetic radiation. Thomson showed that cathode rays were particles with a negative electric charge and much smaller than an atom. He also thought all atoms contained them. These particles were later named electrons.

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In 1897 in Cambridge, J J Thomson experimented on cathode rays. In Britain, physicists had argued these rays were particles, but German physicists disagreed, thinking they were a type of electromagnetic radiation. Thomson showed that cathode rays were particles with a negative electric charge and much smaller than an atom. He also thought all atoms contained them. These particles were later named electrons. More new window

 
    Michael Faraday, Producing Electricity
  Michael Faraday, Producing Electricity
Michael Faraday was an English chemist and physicist (or natural philosopher, in the terminology of the time) who contributed to the fields of electromagnetism and electrochemistry. Although Faraday received little formal education and knew little of...
 
    Maxwell, Light is an Electromagnetic Wave
  Maxwell, Light is an Electromagnetic Wave
James Clerk Maxwell was a Scottish mathematical physicist. His most notable achievement was to formulate the classical theory of electromagnetic radiation, bringing together for the first time electricity, magnetism, and light as manifestations of th...
 
    Röntgen, Discovers X-rays, 1895
  Röntgen, Discovers X-rays, 1895
Wilhelm Conrad Röntgen was a German physicist, of the University of Würzburg, who, on November 8, 1895, produced and detected electromagnetic radiation in a wavelength range today known as x-rays or Röntgen Rays. Röntgen's discovery of x-rays was not...
 
       
         



 
 
         
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