| 单词 | black light |
| 释义 | > as lemmasblack light black light n. (a) light supposed to be able to pass through objects that are opaque to the eye (now historical); (b) light (electromagnetic radiation) with a wavelength just beyond the violet end of the visible spectrum; ultraviolet light. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > chromatism > [noun] > spectrum > light or rays beyond lavender rays1840 obscure rays1849 black light1896 1896 G. Le Bon in Philos. Mag. 41 236 As they are invisible to the eye, I give the name of black light to those radiations of unknown origin which pass in this way through opaque bodies. 1913 C. S. Page New Philos. v. 227 The ultra-violet are discernible not only by the blackening of silver salts but by their heat. It is a spectrum of black light having a velocity..less than that of violet. 1933 Trans. Illumin. Engin. Soc. 28 618 The ‘black bulb’ ultraviolet lamp..can be easily concealed..projecting invisible radiations of ‘black light’ on to luminous designs painted on the walls. 1957 Encycl. Brit. IX. 426 d Plate 1 (caption) Photograph of white girl made in the dark by black light. 1999 H. Kragh Quantum Generations (2002) 453 The pseudodiscoveries of black light and N-rays. 2009 Time Out N.Y. 26 Feb. 51/4 Dress code: ‘glow-wear black-light reactive or underwater-themed outfits’. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。