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Its lesser size and power compared with electron tubes brings (from 1955) portable radio receivers starting its march through all areas of electronics. The Hungarian-American physicist Peter Carl Goldmark (1906–1977) invents the vinyl record (first published 1952), much less noisy than their predecessors shellac.
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]
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 ...
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.
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.
Pennsylvania's most populous city is Philadelphia. Pennsylvania was founded in 1681 through a royal land grant to William Penn, the son of the state's namesake. Before that, between 1638 and 1655, a southeast portion of the state was part of New Sweden, a Swedish colony.
George Johnstone Stoney (15 February 1826 – 5 July 1911) was an Irish physicist known for introducing the term electron as the "fundamental unit quantity of electricity". [1] He initially named it "electrolion" in 1881, [2] and later named it “electron” in 1891. [3] [4] [5] He published around 75 scientific papers during his lifetime.
A c. 1815 illustration of the Ninth Street campus of the University of Pennsylvania, including the medical department (on left) and the college building (on right). In 1802, the university moved to the unused Presidential Mansion at Ninth and Market Streets, a building that both George Washington and John Adams had declined to occupy while Philadelphia was the nation's capital.