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abstraction > mathematical concept > number > quantity > radiation measurement > spectral feature > spectral line > absorption line > Fraunhofer line > D line
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D line comparison table
Subject has wavelength
D1 line5896 Å
D2 line5890 Å

Next Fraunhofer line: E line    Up: Fraunhofer line, interstellar line    Previous Fraunhofer line: B band