| 单词 | chemical ray |
| 释义 | > as lemmaschemical ray chemical ray n. now historical an invisible constituent of light which acts on a photographic plate and has other chemical effects; an actinic ray (cf. actinism n. 1); an ultraviolet ray; usually in plural. ΚΠ 1804 Jrnl. Nat. Philos. July 216 By means of several prisms we may even separate all the coloured rays from the chemical rays. 1840 Philos. Trans. (Royal Soc.) 130 21 The photographic impression will exhibit in its highest intensity the effect of that particular chemical ray which is thus violently concentrated. 1924 Sci. Monthly Sept. 335 The dark heat rays pass equally well through dark and light cloth, and the ultra-violet chemical rays pass better through light than dark. 2005 Stud. Hist. & Philos. Sci. 36 690 Niels Finsen..won the 1903 Nobel prize for physiology or medicine for his work on the use of chemical rays for the treatment of lupus vulgaris and other diseases. < as lemmas |
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