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单词 electromagnetic spectrum
释义

electromagnetic spectrum


electromagnetic spectrumelectromagnetic spectrum frequencies in hertzA. gamma raysB. x-raysC. ultraviolet raysD. visible lightE. infrared raysF. microwavesG. radio waves

electromagnetic spectrum

n. The entire range of electromagnetic radiation, which includes, in order of increasing frequency and decreasing wavelength, radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, x-rays, and gamma rays.

electromagnetic spectrum

n (General Physics) the complete range of electromagnetic radiation from the longest radio waves (wavelength 105 metres) to the shortest gamma radiation (wavelength 10–13 metre)

elec′tromagnet′ic spec′trum


n. the entire continuous spectrum of all forms of electromagnetic radiation, from gamma rays to long radio waves.
electromagnetic spectrumThe electromagnetic spectrum can be measured in frequencies or in wavelengths. This diagram measures wavelengths in meters, ranging from the longest wavelengths (radio waves) to the shortest (gamma rays). Visible light, which is a band of colors from red to violet, is the only portion of the spectrum that can be seen by the human eye.

electromagnetic spectrum

The entire range of electromagnetic radiation. At one end of the spectrum are gamma rays, which have the shortest wavelengths and high frequencies. At the other end are radio waves, which have the longest wavelengths and low frequencies. Visible light, with intermediate wavelengths and frequencies, is near the center of the spectrum.

electromagnetic spectrum

The range of frequencies of electromagnetic radiation from zero to infinity. It is divided into 26 alphabetically designated bands. See also electronic warfare.
Thesaurus
Noun1.electromagnetic spectrum - the entire frequency range of electromagnetic wavesradio frequency - an electromagnetic wave frequency between audio and infraredextremely low frequency, ELF - below 3 kilohertzvery low frequency, VLF - 3 to 30 kilohertzLF, low frequency - 30 to 300 kilohertzmedium frequency, MF - 300 to 3000 kilohertzhigh frequency, HF - 3 to 30 megahertzvery high frequency, VHF - 30 to 300 megahertzUHF, ultrahigh frequency - 300 to 3000 megahertzSHF, superhigh frequency - 3 to 30 gigahertzEHF, extremely high frequency - 30 to 300 gigahertzspectrum - an ordered array of the components of an emission or waveactinic radiation, actinic ray - electromagnetic radiation that can produce photochemical reactionsgamma radiation, gamma ray - electromagnetic radiation emitted during radioactive decay and having an extremely short wavelengthinfrared spectrum - the spectrum of infrared radiationlight, visible light, visible radiation - (physics) electromagnetic radiation that can produce a visual sensation; "the light was filtered through a soft glass window"line - a single frequency (or very narrow band) of radiation in a spectrummicrowave - a short electromagnetic wave (longer than infrared but shorter than radio waves); used for radar and microwave ovens and for transmitting telephone, facsimile, video and datamicrowave spectrum - the part of the electromagnetic spectrum corresponding to microwavesradio spectrum, radio-frequency spectrum - the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and televisionultraviolet spectrum - the spectrum of ultraviolet radiationcolor spectrum, visible spectrum - the distribution of colors produced when light is dispersed by a prism
Translations
espectro electromagnético

electromagnetic spectrum


electromagnetic spectrum

See electromagnetic radiation.

electromagnetic spectrum

[i¦lek·trō·mag′ned·ik ′spek·trəm] (electromagnetism) The total range of wavelengths or frequencies of electromagnetic radiation, extending from the longest radio waves to the shortest known cosmic rays.

electromagnetic spectrum

electromagnetic spectrumThe ordered array of known electromagnetic radiation, extending from the shortest cosmic rays, through gamma rays, X-rays, ultraviolet radiation, visible radiation, and infrared radiation. It includes microwave and all other wavelengths of radio energy. See the illustration for a more detailed view of this spectrum.

electromagnetic spectrum


e·lec·tro·mag·net·ic ra·di·a·tion

, electromagnetic spectrum (ĕ-lek'trō-mag-net'ik rā'dē-ā'shŭn, spek'trŭm) Wavelike energy propagated through matter or space; varies widely in wavelength, frequency, photon energy, and properties; may be natural or artificial and includes radiowaves, microwaves, heat waves, visible light, ultraviolet light, x-rays, gamma rays, and cosmic radiation.

electromagnetic spectrum

The continuum of radiation, varying in frequency, and, correspondingly, wavelength, that includes, in order of decreasing frequency, cosmic ray photons, gamma rays, X rays, ultraviolet radiation, visible light, infrared radiation, microwaves, radio waves and heat.
Electromagnetic spectrumFig. 142 Electromagnetic spectrum . The wavelength ranges of the electromagnetic spectrum.

electromagnetic spectrum

the entire range of wavelengths of electromagnetic radiation, most of which are not detectable by the human eye except in the visible spectrum from about 400–700 nm wavelength. Wavelengths shorter than the visible spectrum contain large quantities of energy which can be harmful to living material. See Fig. 141 . See X-RAY, GAMMA RADIATION, ULTRAVIOLET LIGHT.

e·lec·tro·mag·net·ic ra·di·a·tion

, electromagnetic spectrum (ĕ-lek'trō-mag-net'ik rā'dē-ā'shŭn, spek'trŭm) Wavelike energy propagated through matter or space; varies widely in wavelength, frequency, photon energy, and properties; may be natural or artificial and includes x-rays, gamma rays, and other forms.
See EMSPEC
See EMSPEC

electromagnetic spectrum


  • noun

Words related to electromagnetic spectrum

noun the entire frequency range of electromagnetic waves

Related Words

  • radio frequency
  • extremely low frequency
  • ELF
  • very low frequency
  • VLF
  • LF
  • low frequency
  • medium frequency
  • MF
  • high frequency
  • HF
  • very high frequency
  • VHF
  • UHF
  • ultrahigh frequency
  • SHF
  • superhigh frequency
  • EHF
  • extremely high frequency
  • spectrum
  • actinic radiation
  • actinic ray
  • gamma radiation
  • gamma ray
  • infrared spectrum
  • light
  • visible light
  • visible radiation
  • line
  • microwave
  • microwave spectrum
  • radio spectrum
  • radio-frequency spectrum
  • ultraviolet spectrum
  • color spectrum
  • visible spectrum
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更新时间:2024/9/23 4:22:51