absorption line


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Related to absorption line: absorption spectrum, Emission lines, Spectral lines, Absorption spectra

absorption line

[əb′sȯrp·shən ‚līn]
(spectroscopy)
A minute range of wavelength or frequency in the electromagnetic spectrum within which radiant energy is absorbed by the medium through which it is passing.
References in periodicals archive ?
27 PHYSICAL REVIEW LETTERS, they present data suggesting that the spacings between absorption lines for several types of atoms 8 to 12 billion years ago were different than they are today.
Previous studies had found a few examples of quasars whose broad absorption lines seemed to have disappeared between one observation and the next.
In the course of observing quasars, astronomers have discovered clouds of hydrogen gas that make their presence known by absorbing some of the quasar's radiation, creating a thicket of absorption lines.
Molecules and chemical compounds, particularly in the gas phase, showed strong absorption lines that can serve as "fingerprints" of the molecules.
This capability allows design engineers to precisely pump narrow absorption lines in solid-state and fiber lasers with little or no active temperature control.
Diffuse Interstellar Bands (DIB) are broad absorption lines in the spectra of stars indicating the existence of clouds of complex, unidentified molecules in the space between the stars.
A decade ago, researchers discovered that some of the absorption lines are much stronger than others.