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Dark-line spectrum is a "photo-negative" of emission spectrum. It is the gaps that appear in precisely the same location as corresponding bright lines. produced by a cool gas with a hot solid and you

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13y ago
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15y ago

If the atom is emitting light then the spectral line is bright, if the atom is absorbing light the spectral line is dark, So emission spectra are bright.

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9y ago

Read the discussion post first before answering.

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Q: What kind of spectrum do dark lines appear against a bright a bright background of colors ranging from red to blue?
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