| 单词 | comparison spectrum |
| 释义 | > as lemmascomparison spectrum comparison spectrum n. a spectrum formed for comparison, wave-length by wave-length, with the spectrum under observation. 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 1877 G. F. Chambers Handbk. Descr. Astron. (ed. 3) x. ii. 843 The light from the terrestrial substance which gives the comparison spectrum. 1897 Daily News 18 June 8/3 When the problem had to be solved of a satisfactory introduction of light for the comparison spectrum. < as lemmas |
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