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EnglishEdit

EtymologyEdit

light (visible) +‎ spectrum (range of electromagnetic wavelengths)

NounEdit

light spectrum (plural light spectrums or light spectra)

  1. (physics) The portion of the electromagnetic spectrum that is visible to humans.
  2. (physics) an extension of the human-visible spectrum to include near-visible wavelengths, primarily near infrared.

SynonymsEdit