absorption line


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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.
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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.
Constant Changes
Previous studies had found a few examples of quasars whose broad absorption lines seemed to have disappeared between one observation and the next.
Case of Missing Quasar Gas Clouds Solved
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.
After Hubble: the Next Generation: probing the final frontier
Molecules and chemical compounds, particularly in the gas phase, showed strong absorption lines that can serve as "fingerprints" of the molecules.
JUST HOW LEAN IS THAT GROUND BEEF?AT&T SCIENTISTS CREATE INNOVATIVE SYSTEM TO 'SEE' WHAT THINGS ARE MADE OF
This capability allows design engineers to precisely pump narrow absorption lines in solid-state and fiber lasers with little or no active temperature control.
Alfalight's 976 nm Wavelength-Stabilized Diode Lasers Provide Efficient Pumping Without Cooling; Innovative Technology Ideal for Pumping of High-Performance Pulsed Fiber Lasers
16]O gas, which has many absorption lines in t his region.
NIST produces two new wavelength calibration standards for the wavelength division multiplexing L-band. (Standard Reference Materials)
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.
Patterns in distribution and characteristics of diffuse interstellar bands
A decade ago, researchers discovered that some of the absorption lines are much stronger than others.
Found: primeval galaxies; an abundance of ancestral galaxies revealed

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