Definitions for "Spectral Line"
light of a specific wavelength in a spectrum.
An especially dark or bright line present in an electromagnetic spectrum that represents the absorption or emission of energy at a particular wavelength. Dark lines are called absorption lines because they represent the absorption of energy, and bright lines are called emission lines because they represent the emission of energy. The study of spectral lines is called spectroscopy.
a dark or bright line in an otherwise uniform and continuous spectrum The optical spectrum (light or visible spectrum) is the portion of the electromagnetic spectrum that is visible to the human eye
Keywords:  brightly, brighter, shines, nearby, sun
a very narrow range of colors at which an object such as the Sun shines less brightly (usually) or brighter than at nearby colors