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abstraction > mathematical concept > number > quantity > radiation measurement > spectral feature > spectral line > emission line > inverse P Cygni line |
inverse P Cygni line comparison table |
Subject | has definition | is a kind of |
---|---|---|
emission line | Bright lines produced in a spectrum by a luminous source, such as a star or a bright nebula. | spectral line |
inverse P Cygni line | An emission line in which the emission is on the violet side of the absorption. It is usually interpreted to mean infall of matter. | emission line |
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