| 单词 | emission spectrum |
| 释义 | > as lemmasemission spectrum emission spectrum n. a spectrum which shows the radiations from an emitting source. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > chromatism > [noun] > spectrum > types of Fraunhofer spectrum1837 gas spectrum1859 interference spectrum1860 flame spectrum1862 absorption spectrum1864 fluorescence spectrum1867 band spectrum1869 comparison spectrum1877 infra-red1881 emission spectrum1888 X-ray spectrum1910 1888 London, Edinb. & Dublin Philos. Mag. 5th Ser. 26 289 Ångström thought it improbable that oxygen should have a spectrum of such a character, since he failed to obtain an emission spectrum resembling it. 1930 G. Thomson Atom ii. 22 It is from the position of these black lines (Fraunhofer lines) that the nature of the substances present in the sun has been found. Such a black line spectrum is called an ‘absorption’ spectrum, in contrast to the bright line ‘emission’ spectrum. 1962 Listener 31 May 949/2 Surrounding the Sun is a layer made up of tenuous gas, which, if seen on its own, would produce an emission spectrum made up of isolated bright lines. < as lemmas |
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