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 ?
When the researchers simulated the Hitomi spectrum by adding this absorption line to the hot gas' emission line seen with Chandra and XMM-Newton, they found no evidence in the summed spectrum for either absorption or emission of X-rays at 3.
Radiation absorption analysis for a given substance can be done for a single absorption line (dispersive methods) or for wide spectrum (non-dispersive methods) [2], [6].
Spectroscopic observations map the Mrk 509 warm absorber, study the mini-broad absorption line quasar PG 1126-041, determine the source of reddening in low ionization BAL quasars, and probe quasar winds using narrow intrinsic absorption lines.
But the aim is to create a system with a small cell containing acetylene gas and send the beam from the laser through it: if the laser is not on the right frequency, the light "dips" as it goes through the absorption line and comes back.
MeerKAT Absorption Line Survey, led by Dr Yashwant Gupta and Dr Raghunathan Srianand, both associated with the Giant Metrewave Radio Telescope in India--4 000 hours.
The properties of atmospheric physics, the Earth's atmosphere, propagation of radiation, and molecular absorption in the atmosphere are the subjects of the introductory chapters, with separate sections on intensity and radiation flux, radiation transfer equations, and the main mechanisms of formation of the absorption line shapes.
Here the nation of France is cast seemingly as a 'faint hair-breadth line' (an absorption line, perhaps?
When analyzing the effects of the real exchange rate appreciation in the framework of the Salter-Swan-Meade diagram in Figure 2, turn the absorption line (A) and the income line (S) to the right (to A' and S', respectively) so they become more steep.
2[nm] (ionized Calcium) absorption line becomes shallow.
The process begins when the sample is ablated by a short, mid-infrared laser pulse that is tuned to the strong absorption line of liquid water (2,940 nm).
The text is about 30 pages, followed by 70 pages of number lists detailing Arcturus and solar emission and absorption line wavelengths, and another 250 pages of graphs--the atlas itself.
If one of the FBG reflectors is located near an atomic or molecular absorption line, it can be actively stabilized to that line.