radio radiation

См. также в других словарях:

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

• radio source — Astron. a cosmic object or phenomenon, as a galaxy, pulsar, quasar, or the remnant of a supernova or of a galactic collision, that emits radio waves. [1945 50] * * * ▪ astronomy       in astronomy, any of various objects in the universe that emit …   Universalium

• radio and radar astronomy — Study of celestial bodies by measuring the energy they emit or reflect at radio wavelengths. It began in 1931 with Karl Jansky s discovery of radio waves from an extraterrestrial source. After 1945, huge dish antennas, improved receivers and data …   Universalium

• 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-quiet neutron star — A radio quiet neutron star is a neutron star that does not seem to emit radio emissions like most other neutron stars. Most neutron stars are pulsars, and emit radio radiation.Quark stars, theoretical neutron star like objects composed of quark… …   Wikipedia

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

• radio signal — noun a radio wave used to transmit and receive messages • Hypernyms: ↑radio wave, ↑radio emission, ↑radio radiation …   Useful english dictionary

• Radio astronomy — is a subfield of astronomy that studies celestial objects at radio frequencies. The field originated from the discovery that many astronomical objects emit radiation in the radio wavelengths as well as optical ones. The great advances in radio… …   Wikipedia

• Radio galaxy — Radio galaxies and their relatives, radio loud quasars and blazars, are types of active galaxy that are very luminous at radio wavelengths (up to 1038 W between 10 MHz and 100 GHz). The radio emission is due to the synchrotron process. The… …   Wikipedia