| 单词 | spectrum |
| 释义 | spectrum (once / 1331 pages) n A spectrum is a broad range of similar things or qualities. Like the wide spectrum of political beliefs in this country, ranging anywhere from super conservative to uber-liberal and everything in between. Our modern definition of spectrum started out in the 1600s, when scientists used it to refer to the band of colors formed by a beam of light, like a rainbow. In physics, it’s a word that describes the distribution of something, like energy or atomic particles. We still use those scientific meanings today, but spectrum can also apply to non-science related groupings or ranges of related things. WORD FAMILYspectrum: spectra, spectrums USAGE EXAMPLESAnd this year, the lab started a partnership with Bellevue College’s Autism Spectrum Navigators program, and is offering students with autism a chance to intern. Seattle Times(Jan 02, 2017) The statement reaffirmed Washington’s “ironclad commitment” to defend its allies, using “the full spectrum of US extended deterrence capabilities.” The Guardian(Jan 01, 2017) She applauds trans activists for adopting the idea that “gender is fluid and on a spectrum.” New York Times(Dec 31, 2016) 1n a broad range of related objects or values or qualities or ideas or activities Hyper ambit, compass, orbit, range, reach, scope an area in which something acts or operates or has power or control: "the range of a supersonic jet" 2n an ordered array of the components of an emission or wave Hypo|Hyper absorption spectrum the spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths action spectrumthe efficiency with which electromagnetic radiation produces a photochemical reaction plotted as a function of the wavelength of the radiation atomic spectrum(physics) a spectrum of radiation caused by electron transitions within an atom; the series of spectrum lines is characteristic of the element electromagnetic spectrumthe entire frequency range of electromagnetic waves emission spectrumspectrum of electromagnetic radiation emitted by a self-luminous source infrared spectrumthe spectrum of infrared radiation line spectruma spectrum in which energy is concentrated at particular wavelengths; produced by excited atoms and ions as they fall back to a lower energy level mass spectruma distribution of ions as shown by a mass spectrograph or a mass spectrometer microwave spectrumthe part of the electromagnetic spectrum corresponding to microwaves radio spectrum, radio-frequency spectrumthe entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television acoustic spectrum, sound spectrumthe distribution of energy as a function of frequency for a particular sound source ultraviolet spectrumthe spectrum of ultraviolet radiation color spectrum, visible spectrumthe distribution of colors produced when light is dispersed by a prism speech spectrumthe average sound spectrum for the human voice array an orderly arrangement |
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