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1 velocity of electromagnetic waves
Engineering: CУниверсальный русско-английский словарь > velocity of electromagnetic waves
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2 скорость электромагнитных волн
Русско-английский физический словарь > скорость электромагнитных волн
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3 скорость распространения электромагнитных волн
Engineering: electromagnetic velocity, velocity of electromagnetic wavesУниверсальный русско-английский словарь > скорость распространения электромагнитных волн
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4 Ausbreitungsgeschwindigkeit elektromagnetischer Wellen
Ausbreitungsgeschwindigkeit f elektromagnetischer Wellen FS, PH propagation velocity of electromagnetic waves (c = 1/√με = co = 1/√μoεo = 3 × 108 m/s im Vakuum; s. a. Lichtgeschwindigkeit)Deutsch-Englisch Wörterbuch der Elektrotechnik und Elektronik > Ausbreitungsgeschwindigkeit elektromagnetischer Wellen
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5 Heaviside, Oliver
[br]b. 18 May 1850 London, Englandd. 2 February 1925 Torquay, Devon, England[br]English physicist who correctly predicted the existence of the ionosphere and its ability to reflect radio waves.[br]Brought up in poor, almost Dickensian, circumstances, at the age of 13 years Heaviside, a nephew by marriage of Sir Charles Wheatstone, went to Camden House Grammar School. There he won a medal for science, but he was forced to leave because his parents could not afford the fees. After a year of private study, he began his working life in Newcastle in 1870 as a telegraph operator for an Anglo-Dutch cable company, but he had to give up after only four years because of increasing deafness. He therefore proceeded to spend his time studying theoretical aspects of electrical transmission and communication, and moved to Devon with his parents in 1889. Because the operation of many electrical circuits involves transient phenomena, he found it necessary to develop what he called operational calculus (which was essentially a form of the Laplace transform calculus) in order to determine the response to sudden voltage and current changes. In 1893 he suggested that the distortion that occurred on long-distance telephone lines could be reduced by adding loading coils at regular intervals, thus creating a matched-transmission line. Between 1893 and 1912 he produced a series of writings on electromagnetic theory, in one of which, anticipating a conclusion of Einstein's special theory of relativity, he put forward the idea that the mass of an electric charge increases with its velocity. When it was found that despite the curvature of the earth it was possible to communicate over very great distances using radio signals in the so-called "short" wavebands, Heaviside suggested the presence of a conducting layer in the ionosphere that reflected the waves back to earth. Since a similar suggestion had been made almost at the same time by Arthur Kennelly of Harvard, this layer became known as the Kennelly-Heaviside layer.[br]Principal Honours and DistinctionsFRS 1891. Institution of Electrical Engineers Faraday Medal 1924. Honorary PhD Gottingen. Honorary Member of the American Association for the Advancement of Science.Bibliography1872. "A method for comparing electro-motive forces", English Mechanic (July).1873. Philosophical Magazine (February) (a paper on the use of the Wheatstone Bridge). 1889, Electromagnetic Waves.1892, Electrical Papers.1893–1912, Electromagnetic Theory.Further ReadingI.Catt (ed.), 1987, Oliver Heaviside, The Man, St Albans: CAM Publishing.P.J.Nahin, 1988, Oliver Heaviside, Sage in Solitude: The Life and Works of an Electrical Genius of the Victorian Age, Institute of Electrical and Electronics Engineers, New York.J.B.Hunt, The Maxwellians, Ithaca: Cornell University Press.See also: Appleton, Sir Edward VictorKF
См. также в других словарях:
velocity of electromagnetic waves in vacuum — elektromagnetinių bangų greitis vakuume statusas T sritis Standartizacija ir metrologija apibrėžtis Apibrėžtį žr. priede. priedas( ai) Grafinis formatas atitikmenys: angl. speed of electromagnetic waves in vacuum; velocity of electromagnetic… … Penkiakalbis aiškinamasis metrologijos terminų žodynas
velocity of electromagnetic waves in vacuum — elektromagnetinių bangų greitis vakuume statusas T sritis fizika atitikmenys: angl. speed of electromagnetic waves in vacuum; velocity of electromagnetic waves in vacuum rus. скорость электромагнитных волн в вакууме, f pranc. vitesse des ondes… … Fizikos terminų žodynas
phase velocity of electromagnetic waves — fazinis elektromagnetinių bangų greitis statusas T sritis Standartizacija ir metrologija apibrėžtis Greitis, kuriuo sklinda elektromagnetinių bangų fazė. atitikmenys: angl. phase speed of electromagnetic waves; phase velocity of electromagnetic… … Penkiakalbis aiškinamasis metrologijos terminų žodynas
phase velocity of electromagnetic waves — fazinis elektromagnetinių bangų greitis statusas T sritis fizika atitikmenys: angl. phase speed of electromagnetic waves; phase velocity of electromagnetic waves rus. фазовая скорость электромагнитных волн, f pranc. vitesse de phase des ondes… … Fizikos terminų žodynas
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speed of electromagnetic waves in vacuum — elektromagnetinių bangų greitis vakuume statusas T sritis Standartizacija ir metrologija apibrėžtis Apibrėžtį žr. priede. priedas( ai) Grafinis formatas atitikmenys: angl. speed of electromagnetic waves in vacuum; velocity of electromagnetic… … Penkiakalbis aiškinamasis metrologijos terminų žodynas
phase speed of electromagnetic waves — fazinis elektromagnetinių bangų greitis statusas T sritis Standartizacija ir metrologija apibrėžtis Greitis, kuriuo sklinda elektromagnetinių bangų fazė. atitikmenys: angl. phase speed of electromagnetic waves; phase velocity of electromagnetic… … Penkiakalbis aiškinamasis metrologijos terminų žodynas
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