absorption line


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absorption line

A black line in the continuous spectrum of light passing through an absorbing medium.
See also: line
References in periodicals archive ?
If so, it could be possible to observe an absorption line at 3.
For the case of a single absorption line and low CO concentrations it can lead to significant errors.
For the frequencies currently used for data transmission through optical fibres of around 1550GHz, acetylene gas has absorption lines at about the same part of the spectrum, and these can be used as the standards to calibrate individual lasers.
Figure 3 depicts how transfers from West to East Germany shift the absorption line from A to A'.
Spectroscopic observations allow observers to estimate the rotation velocity from the broadening of absorption lines, and confirm that a velocity derived from spectroscopic data matches the brightness variation timescale as the star rotates.
The evaporating comet, which is what we see with comets such as Halley and next year's highly anticipated Comet ISON, creates a brief, telltale absorption line in the spectrum of a star.
For this project, I modified my LHIRES spectrograph, extending its range into the far red to cover a potassium absorption line at 769.
So, if light from both images carried the same fingerprint -- the same absorption line -- this would indicate that the hydrogen cloud was wide enough for both beams to pass through it.
If you name a particular absorption line in an atom, I can devise a way to make that absorption line from reasonably to very transparent.
By observing a distant quasar in Piscis Austrinus, five researchers at MIT were able to measure an X-ray absorption line that arises in an intervening gas cloud.
By focusing on a single absorption line in the solar spectrum, researchers can detect motion by measuring how much that line's wavelength has shifted from its normal position.