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Discover LudwigThe phrase "absorption line" is correct and usable in written English.
It is typically used in the context of physics or astronomy to refer to a specific wavelength of light that is absorbed by a substance, indicating the presence of certain elements or compounds.
Example: "The spectrum of the star showed several absorption lines, revealing the elements present in its atmosphere."
Alternatives: "absorption spectrum" or "absorption feature".
Dictionary
absorption line
noun
A spectral line that corresponds to the absorption of electromagnetic radiation at a specific wavelength; the pattern of such lines is characteristic of specific atoms or molecules in the path of the radiation.
synonyms
Exact(60)
The spectra of an absorption line in the hydrogen atom as measured by normal fluorescence spectroscopy is shown in Figure 1A.
This phenomenon gives rise in the simplest case to a paramagnetic-resonance absorption spectrum consisting of a single sharp absorption line.
The absorption line of neutral calcium at 4227 Å is thus strong in cool M-type dwarf stars, in which the pressure is high and the temperature is low.
If the frequency spread of the light is much less than the Doppler-broadened absorption line, only those atoms with a narrow velocity spread will be excited, since the other atoms will be Doppler-shifted out of resonance.
Because a neutral cloud moves through space as a single entity, it often can be distinguished by the absorption line that its atoms or ions produce at their common radial velocity in the spectrum of a background star.
As a result, each one has an absorption line at a slightly different frequency.
This is due to the dependence of the absorption line intensity on temperature.
Near the bottom of this absorption line, Na emission feature is noticed (Hossain et al. 2010).
Therefore, a stronger absorption line could be expected for warmer SSTs.
The observed intensive absorption line γ− is to be considered separately.
The map of an absorption line with unknown origins correlates well with a map of extinction by interstellar dust.
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