| 单词 | fraunhofer lines |
| 释义 | Fraunhofer linesplural noun Astronomy.the dark lines of the solar spectrum. Origin of Fraunhofer linesFirst recorded in 1830–40; named after J. von Fraunhofer Words nearby Fraunhofer linesFrauenfeld, fraughan, fraught, Fräulein, Fraunhofer, Fraunhofer lines, Fravashi, frawzey, fraxinella, fray, Fray Bentos Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for Fraunhofer linesFraunhofer lines / (German ˈfraunhoːfər) / pl na 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 Word Origin for Fraunhofer linesnamed after J. von Fraunhofer (1787–1826), German physicist Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 |
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