A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range ...
noun, Optics. 1. a line in a spectrum due to the absorption or emission of light at a discrete frequency.
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H-Alpha light is a spectral line centred on 656nm, and although it is the strongest emission line of ionised hydrogen, our eyes are not very sensitive to the deep red.
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Spectral line shape describes the form of a feature, observed in spectroscopy, corresponding to an energy change in an atom, molecule or ion. Ideal line shapes ...
A spectral line is like a fingerprint that can be used to identify the atoms, elements or molecules present in a star, galaxy or cloud of interstellar gas.
Observations of spectral line s of carbon monoxide in HD 209458b’s atmosphere showed that winds with speeds of hundreds of kilometres per second travel from the ...
any of a number of lines in a spectrum produced by the emission of electromagnetic radiation from an excited atom: a spectral line represents the energy difference ...
Spectral lines are how scientists tell one element from another by looking at color. The colors of the rainbow. In order to understand spectral lines, color has to be ...