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emission spectrum
noun
, Physics.
- the spectrum formed by electromagnetic radiations emitted by a given source, characteristic of the source and the type of excitation inducing the radiations.
emission spectrum
noun
- the continuous spectrum or pattern of bright lines or bands seen when the electromagnetic radiation emitted by a substance is passed into a spectrometer. The spectrum is characteristic of the emitting substance and the type of excitation to which it is subjected Compare absorption spectrum
emission spectrum
- The distribution of electromagnetic radiation released by a substance whose atoms have been excited by heat or radiation. A spectroscope can be used to determine which frequencies have been emitted by a substance. The emission spectrum is a combination of the atomic spectra of the various kinds of atoms making up the substance and can be analyzed to determine the substance's chemical or atomic composition.
- See more at atomic spectrum
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Word History and Origins
Origin of emission spectrum1
First recorded in 1885–90
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Example Sentences
During their examination of Pa 30, Ritter and his colleagues noted that the remnant’s emission spectrum contained a particular line associated with the element sulfur.
From Scientific American
At 100 K, a structuring of the emission spectrum is observed compared to the one at room temperature.
From Nature
Manipulating its emission spectrum is a clever idea.
From Economist
A layer of graphene is used to control the emission spectrum of a laser.
From Science Magazine
In such a case, “it's okay to have the emission spectrum overlap because you are imaging individual molecules”, says Hess.
From Nature
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