Jisho

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せん
Noun
1. spectral linePhysics
Wikipedia definition
2. Spectral lineA spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from a deficiency or excess of photons in a narrow frequency range, compared with the nearby frequencies.
Read “Spectral line” on English Wikipedia
Read “スペクトル線” on Japanese Wikipedia
Read “Spectral line” on DBpedia

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