Search results
Results from the WOW.Com Content Network
Moore School of Electrical Engineering. The Moore School of Electrical Engineering at the University of Pennsylvania came into existence as a result of an endowment from Alfred Fitler Moore on June 4, 1923. It was granted to Penn's School of Electrical Engineering, located in the Towne Building. The first dean of the Moore School was Harold Pender.
A 1906 proposal to change to electrion failed because Hendrik Lorentz preferred to keep electron. [19] [20] The word electron is a combination of the words electric and ion. [21] The suffix -on which is now used to designate other subatomic particles, such as a proton or neutron, is in turn derived from electron. [22] [23]
Belgian engineer Zenobe Gramme who developed the DC generator accidentally discovered that a DC generator also works as a DC motor during an exhibit in Vienna. 1876: Paper capacitor manufacturing started. 1876: Russian engineer Pavel Yablochkov invented the electric carbon arc lamp. 1876: Scottish inventor Alexander Graham Bell patented the ...
1897 J. J. Thomson discovered the electron; 1897 Emil Wiechert, Walter Kaufmann and J.J. Thomson discover the electron; 1898 Marie and Pierre Curie discovered the existence of the radioactive elements radium and polonium in their research of pitchblende; 1898 William Ramsay and Morris Travers discover neon, and negatively charged beta particles
This became the classic means of measuring the charge-to-mass ratio of the electron. Later in 1899 he measured the charge of the electron to be of 6.8 × 10 −10 esu. [33] Thomson believed that the corpuscles emerged from the atoms of the trace gas inside his cathode-ray tubes. He thus concluded that atoms were divisible, and that the ...
He was born in Cressona, Pennsylvania on February 26, 1858 to William Hammer (1827–1895) and Martha Augusta Beck (1827–1861). [1] [2] He became a laboratory assistant to Thomas Edison in December 1879, and assisted in the development of the incandescent light bulb. [3] He became one of the world's earliest experts in electric power ...
The electron was discovered between 1879 and 1897 in works of William Crookes, Arthur Schuster, J. J. Thomson, and other physicists; its charge was carefully measured by Robert Andrews Millikan and Harvey Fletcher in their oil drop experiment of 1909.
J. J. Thomson (1856–1940) discovered the electron and isotopy and also invented the mass spectrometer. He was awarded the Nobel Prize in Physics in 1906. In the 19th century, experimenters began to detect unexpected forms of radiation: Wilhelm Röntgen caused a sensation with his discovery of X-rays in 1895; in 1896 Henri Becquerel discovered ...