#spectrum  an ordered array of the components of an emission or wave
  supertype:  #array  an orderly arrangement: "an array of troops in battle order"
  part:  #spectrum_line
  subtype:  #absorption_spectrum  the spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths
  subtype:  #action_spectrum  the efficiency with which electromagnetic radiation produces a photochemical reaction plotted as a function of the wavelength of the radiation
  subtype:  #electromagnetic_spectrum__electromagneticspectrum  the entire frequency range of electromagnetic waves
  subtype:  #emission_spectrum  spectrum of electromagnetic radiation emitted by a self-luminous source
  subtype:  #infrared_spectrum  the spectrum of infrared radiation
  subtype:  #line_spectrum  a spectrum in which energy is concentrated at particular wavelengths; produced by excited atoms and ions as they fall back to a lower energy level
  subtype:  #microwave_spectrum__microwavespectrum  the part of the electromagnetic spectrum corresponding to microwaves
  subtype:  #radio_spectrum__radiospectrum__radio-frequency_spectrum__radiofrequencyspectrum  the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television
  subtype:  #sound_spectrum__soundspectrum__acoustic_spectrum  the distribution of energy as a function of frequency for a particular sound source
     subtype:  #speech_spectrum  the average sound spectrum for the human voice
  subtype:  #ultraviolet_spectrum__ultravioletspectrum  the spectrum of ultraviolet radiation
  subtype:  #visible_spectrum__visiblespectrum__colorspectrum  the distribution of colors produced when light is dispersed by a prism

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