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radio waves (noun)

См. также в других словарях:

  • Radio — is the transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light.Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of… …   Wikipedia

  • radio star — noun : a radio source of very small dimensions and relatively strong radiation and sometimes identified with certain small nebulosities and galaxies * * * Astron. Now Rare. a radio source. [1945 50] * * * radio star noun A discrete source of… …   Useful english dictionary

  • radio spectrum — noun the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television (Freq. 1) • Syn: ↑radio frequency spectrum • Hypernyms: ↑spectrum • Part Holonyms: ↑electromagnetic… …   Useful english dictionary

  • radio telescope — noun astronomical telescope that picks up electromagnetic radiations in the radio frequency range from extraterrestrial sources (Freq. 1) • Syn: ↑radio reflector • Hypernyms: ↑astronomical telescope • Hyponyms: ↑radio interferometer …   Useful english dictionary

  • radio source — noun an object that radiates radio waves (Freq. 3) • Hypernyms: ↑radiator * * * noun : a region of the sky exclusive of the sun and members of the solar system from which microwave energy is received * * * Astron. a cosmic object or phenomenon,… …   Useful english dictionary

  • radio wave — noun an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m (Freq. 2) • Syn: ↑radio emission, ↑radio radiation • Hypernyms: ↑electromagnetic radiation, ↑electromagnetic wave, ↑nonparticulate radiation …   Useful english dictionary

  • radio link — noun a two way radio communication system (usually microwave); part of a more extensive telecommunication network • Syn: ↑link • Hypernyms: ↑communication system • Hyponyms: ↑walkie talkie, ↑walky talky * * * …   Useful english dictionary

  • radio astronomy — noun Date: 1948 astronomy dealing with radio waves received from outside the earth s atmosphere • radio astronomer noun • radio astronomical adjective …   New Collegiate Dictionary

  • radio emission — noun an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m (Freq. 16) • Syn: ↑radio wave, ↑radio radiation • Hypernyms: ↑electromagnetic radiation, ↑electromagnetic wave, ↑nonparticulate radiation …   Useful english dictionary

  • radio — noun (plural radios) 1》 the transmission and reception of radio waves, especially those carrying audio messages. 2》 the activity of broadcasting sound to the public.     ↘a broadcasting station or channel. 3》 an apparatus for receiving radio… …   English new terms dictionary

  • radio astronomy — noun The branch of astronomy which utilizes radio waves through the use of radio telescopes to study celestial bodies and occurrences …   Wiktionary

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