| 单词 | flash spectrum |
| 释义 | > as lemmasflash spectrum flash spectrum n. (a) a spectrum of the chromosphere which appears at the beginning and end of totality of a solar eclipse; (b) a spectrum of the reactants and reaction products obtained in flash spectroscopy. ΘΚΠ the world > the universe > sun > sunlight > [noun] > solar spectrum Fraunhofer lines1837 Fraunhofer spectrum1837 rainband1877 flash spectrum1898 the world > matter > chemistry > chemical assay or analytical chemistry > [noun] > acetimetry > spectrometry > flash spectroscopy > record from flash spectrum1898 1898 C. A. Young Text-bk. Gen. Astron. (rev.ed.) xi. 267 The ‘flash-spectrum’..was successfully photographed at a number of stations. 1900 Proc. Royal Soc. 67 373 The centre of the flash spectrum arcs was..midway between the edges of the spectrum in the photographs obtained at mid-eclipse. 1926 H. C. Macpherson Mod. Astron. 32 Confirmatory observations of this ‘flash spectrum’, as the phenomenon of reversal from dark to bright was called, were secured at subsequent eclipses. 1950 Proc. Royal Soc. 1949–50 A. 200 299 Effect of capacity on flash spectra of krypton and hydrogen. < as lemmas |
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