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J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
Related Wikipedia articles
J. J. Thomson
English physicist (1856–1940)
Sir Joseph John "J. J." Thomson was an English physicist whose study of cathode rays led to his discovery of the electron, a subatomic particle with a negative electric charge.Source: Wikipedia (CC BY-SA)
Cavendish Laboratory
University of Cambridge Physics Department
The Cavendish Laboratory is the Department of Physics at the University of Cambridge, and is part of the School of Physical Sciences. The laboratory was opened in 1874 on the New Museums Site as a laboratory for experimental physics and is named after the British chemist and…Source: Wikipedia (CC BY-SA)
Electron
Elementary particle with negative charge
The electron is a subatomic particle with a negative one elementary electric charge. It is a fundamental particle that comprises the ordinary matter that makes up the universe, along with up and down quarks.Source: Wikipedia (CC BY-SA)
Subatomic particle
Particle smaller than an atom
In physics, a subatomic particle is a particle smaller than an atom. According to the Standard Model of particle physics, a subatomic particle can be either a composite particle, which is composed of other particles, or an elementary particle, which is not composed of other…Source: Wikipedia (CC BY-SA)
Proton
Subatomic particle with positive charge
A proton is a stable subatomic particle, symbol p, H+, or 1H+ with a positive electric charge of +1 e (elementary charge). Its mass is slightly less than the mass of a neutron and approximately 1836 times the mass of an electron (the proton-to-electron mass ratio). Protons and…Source: Wikipedia (CC BY-SA)
Royal Institution
Organisation for scientific research and education based in Westminster, UK
The Royal Institution of Great Britain is an organisation for scientific education and research, based in the City of Westminster. It was founded in 1799 by the leading British scientists of the age, including Henry Cavendish and its first president, George Finch. Its…Source: Wikipedia (CC BY-SA)
April 30
Day of the year
April 30 is the 120th day of the year in the Gregorian calendar; 245 days remain until the end of the year.Source: Wikipedia (CC BY-SA)