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spectral line
(redirected from Emission line)

   Also found in: Encyclopedia, Wikipedia 0.01 sec.
spectral line
n.
An isolated bright or dark line in a spectrum produced by emission or absorption of light of a single wavelength.

spectral line  (spktrl)
An isolated bright or dark line in a spectrograph produced by emission or absorption of light of a single wavelength, generally corresponding to a specific shift in the energy of an electron moving from one orbital to another.


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Although the changes in the optical spectrum are subtle, amounting to only a few percent of excess emission superimposed on the usual broad emission lines from the WR star, members had honed their observing and data reduction skills in the run up to the campaign and it proved possible to track the changes with good precision.
The material falling into a black hole emits light in narrow wavelength regions forming emission lines which can be seen when the light is dispersed into a spectrum.
Gas tightly bound to an ejected black hole would stay with the hole and rotate rapidly, producing a broad emission line showing up as a fat rather than narrow peak.
 
 
 
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