- a set of dark lines appearing in the continuous emission spectrum of the sun. It is caused by the absorption of light of certain wavelengths coming from the hotter region of the sun by elements in the cooler outer atmosphere
| 单词 | fraunhofer lines |
| 释义 | WordReference Random House Unabridged Dictionary of American English © 2024 Fraun′hofer lines′, [Astron.]
Collins Concise English Dictionary © HarperCollins Publishers:: Fraunhofer lines /German: ˈfraunhoːfər/ pl n
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