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1 Hertz waves
Большой англо-русский и русско-английский словарь > Hertz waves
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2 Hertz waves
1) Техника: радиоволны2) Макаров: волны Герца, электромагнитные волны -
3 Hertz waves
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4 hertz waves
• електромагнитен вълна -
5 Hertz waves
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6 Hertz, Heinrich Rudolph
[br]b. 22 February 1857 Hamburg, Germanyd. 1 January 1894 Bonn, Germany[br]German physicist who was reputedly the first person to transmit and receive radio waves.[br]At the age of 17 Hertz entered the Gelehrtenschule of the Johaneums in Hamburg, but he left the following year to obtain practical experience for a year with a firm of engineers in Frankfurt am Main. He then spent six months at the Dresden Technical High School, followed by year of military service in Berlin. At this point he decided to switch from engineering to physics, and after a year in Munich he studied physics under Helmholtz at the University of Berlin, gaining his PhD with high honours in 1880. From 1883 to 1885 he was a privat-dozent at Kiel, during which time he studied the electromagnetic theory of James Clerk Maxwell. In 1885 he succeeded to the Chair in Physics at Karlsruhe Technical High School. There, in 1887, he constructed a rudimentary transmitter consisting of two 30 cm (12 in.) rods with metal balls separated by a 7.5 mm (0.3 in.) gap at the inner ends and metallic plates at the outer ends, the whole assembly being mounted at the focus of a large parabolic metal mirror and the two rods being connected to an induction coil. At the other side of his laboratory he placed a 70 cm (27½ in.) diameter wire loop with a similar air gap at the focus of a second metal mirror. When the induction coil was made to create a spark across the transmitter air gap, he found that a spark also occurred at the "receiver". By a series of experiments he was not only able to show that the invisible waves travelled in straight lines and were reflected by the parabolic mirrors, but also that the vibrations could be refracted like visible light and had a similar wavelength. By this first transmission and reception of radio waves he thus confirmed the theoretical predictions made by Maxwell some twenty years earlier. It was probably in his experiments with this apparatus in 1887 that Hertz also observed that the voltage at which a spark was able to jump a gap was significantly reduced by the presence of ultraviolet light. This so-called photoelectric effect was subsequently placed on a theoretical basis by Albert Einstein in 1905. In 1889 he became Professor of Physics at the University of Bonn, where he continued to investigate the nature of electric discharges in gases at low pressure until his death after a long and painful illness. In recognition of his measurement of radio and other waves, the international unit of frequency of an oscillatory wave, the cycle per second, is now universally known as the Hertz.[br]Principal Honours and DistinctionsRoyal Society Rumford Medal 1890.BibliographyMuch of Hertz's work, including his 1890 paper "On the fundamental equations of electrodynamics for bodies at rest", is recorded in three collections of his papers which are available in English translations by D.E.Jones et al., namely Electric Waves (1893), Miscellaneous Papers (1896) and Principles of Mechanics (1899).Further ReadingJ.G.O'Hara and W.Pricha, 1987, Hertz and the Maxwellians, London: Peter Peregrinus. J.Hertz, 1977, Heinrich Hertz, Memoirs, Letters and Diaries, San Francisco: San Francisco Press.R.Appleyard, 1930, Pioneers of Electrical Communication.See also: Heaviside, OliverKFBiographical history of technology > Hertz, Heinrich Rudolph
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7 hertz
n физ. герцСинонимический ряд:radio waves (noun) cycle; frequency; oscillation; periodicity; pulsation; pulse; radio waves; rate of vibration; wave length -
8 hertz
[hə: ]plural - hertz; noun((often abbreviated to Hz when written) a unit of frequency used of radio waves etc.) hertz* * *[hə: ]plural - hertz; noun((often abbreviated to Hz when written) a unit of frequency used of radio waves etc.) hertz -
9 Hertz
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10 hertz
[hə: ]plural - hertz; noun* * *<pl ->[hɜ:ts, AM hɜ:rts]n Hertz nt* * * -
11 hertz
hə:plural - hertz; noun((often abbreviated to Hz when written) a unit of frequency used of radio waves etc.) hertzsubst. (flertall: hertz) \/hɜːts\/(fysikk, elektronikk) hertz -
12 hertz
[hə: ]plural - hertz; noun((often abbreviated to Hz when written) a unit of frequency used of radio waves etc.) hertz -
13 hertz
[hə: ]plural - hertz; noun((often abbreviated to Hz when written) a unit of frequency used of radio waves etc.) hercs* * *hercs -
14 hertz
[hə: ]plural - hertz; noun((often abbreviated to Hz when written) a unit of frequency used of radio waves etc.) hercas -
15 hertz
[hə: ]plural - hertz; noun((often abbreviated to Hz when written) a unit of frequency used of radio waves etc.) -
16 hertz
[hə: ]plural - hertz; noun((often abbreviated to Hz when written) a unit of frequency used of radio waves etc.) χερτς(μονάδα συχνότητας) -
17 hertz
[həːts] plural hertz noun هيرْتز: وِحْدَة التردُّد -
18 Hertz'sche Wellen
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19 hertz dalgaları
n. Hertzian waves -
20 Hertz(ian) waves
Англо-русский словарь технических терминов > Hertz(ian) waves
См. также в других словарях:
Hertz: Der Vater der Funktechnik — Im Herbst des Jahres 1886 machte Heinrich Hertz, der 29 jährige Professor für Physik an der Technischen Hochschule in Karlsruhe, in seinem Laboratorium eine folgenreiche Beobachtung. Bei Experimenten mit Drahtspulen, deren Wicklungen von einer… … Universal-Lexikon
hertz — [hə:ts US hə:rts] n plural hertz written abbreviation Hz [Date: 1800 1900; Origin: Heinrich Hertz (1857 94), German scientist who worked on energy waves] a unit for measuring the ↑frequency of ↑sound waves … Dictionary of contemporary English
Hertz — Hertz, n. [from the German physicist Heinrich Hertz.] a unit of frequency equal to one cycle per second; it is abbreviated Hz. It is commonly used to specify the frequency of radio waves, and also the clock frequencies in digital computers. For… … The Collaborative International Dictionary of English
HERTZ, GUSTAV — (1887–1975), German physicist and Nobel Prize winner, son of a Jewish father. Born in Hamburg, he became an assistant in the Physical Institute at Berlin in 1913. He was severely wounded in World War I, and subsequently worked at Eindhoven in… … Encyclopedia of Judaism
hertz — [ hɜrts ] (plural hertz) noun count a unit for measuring sound and radio waves … Usage of the words and phrases in modern English
Hertz,Heinrich Rudolf — Hertz (hûrts, hĕrts), Heinrich Rudolf. 1857 1894. German physicist who was the first to produce radio waves artificially. * * * … Universalium
Hertz , Heinrich Rudolf — (1857–1894) German physicist Hertz came from a prosperous and cultured Hamburg family. In 1875 he went to Frankfurt to gain practical experience in engineering and after a year of military service (1876–77) spent a year at the University of… … Scientists
Hertz — This article is about the unit of frequency. For the rental car company, see The Hertz Corporation. For other uses, see Hertz (disambiguation). MHz and MHZ redirect here. For other uses, see MHZ (disambiguation). Hz redirects here. For other uses … Wikipedia
hertz — (Hz) the SI unit of frequency, equal to one cycle per second. The hertz is used to measure the rates of events that happen periodically in a fixed and definite cycle; the becquerel, also equal to one event per second, is used to measure the… … Dictionary of units of measurement
Hertz — F/A/V 1. Unit for measuring frequency of d signal; formerly called cycles per second. 2. cycles per second of an electrical signal. WikiV The standard unit for measuring frequency. One hertz (abbreviated Hz) equals one cycle per second. It is… … Audio and video glossary
hertz — UK [hɜː(r)ts] / US [hɜrts] noun [countable] Word forms hertz : singular hertz plural hertz physics a unit for measuring the frequency of sound waves and radio waves … English dictionary