spectral line

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spectral line

n.
An isolated bright or dark line in a spectrum produced by emission or absorption of light of a single wavelength.

spec′tral line′


n.
a line in a spectrum due to the absorption or emission of light at a discrete frequency.
[1865–70]
References in periodicals archive ?
At the same time, highly ionized Fe lines (FeX-FeXIV) have been used to image the solar corona in great detail and indicate that these species can be found at elevations well inferior to the known locations of neutral hydrogen emission lines [13-16].
It is so hot that its photosphere exhibits emission lines in the ultraviolet spectrum, a phenomenon that has never been seen before.
Atoms of each element emit characteristic wavelenghts of light, and astronomers can measure changes in the intensity and width of the resulting emission lines in the spectra they observe.
Both the object's variability and broad emission lines are typical of a gas-guzzling black hole with a mass of 1 million Suns.
The interaction between the laser and the target in LIBS is influenced significantly by the overall composition of the target, so that the intensity of the emission lines observed is a function of both the concentration of the elements of interest and the properties of the matrix that contains them.
A preliminary X-ray spectrum of the bright binary star Capella, showing emission lines from ionized iron and silicon.
After all, the pattern of emission lines is the same as that seen in spectra of star-forming regions and planetary nebulae.
The figure contains three spectra as follows: A--the panoramic LIBS spectrum in the spectral range 200-700 nm shows the UV-visible emission lines of aluminum as a major element and the emission lines of the trace elements in the aluminum alloy sample.
It was very perplexing to find that nine or so molecular-hydrogen emission lines all fit the model perfectly, and then to find one that was a factor of 10 fainter than what the model predicted it should be.
A visual observer won't notice anything unusual about these stars, but the clouds produce bright emission lines in the stellar spectra.
The panoramic Echelle spectra in the spectral range 200-750 nm show the UV-visible emission lines of soil sediment samples which have a very rich spectral structure and, consequently a lot of interfering lines.
However, unlike other known types of supergiant stars, B[e] supergiants have spectra that include unusual emission lines from hydrogen, iron and oxygen atoms.

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