| 单词 | footcandle |
| 释义 | > as lemmasfootcandle footcandle n. a unit of illuminance, defined as the degree of illumination that the interior of a sphere with a radius of one foot would receive from a central point source of one candela.A footcandle is equivalent to one lumen per square metre and frequently approximated as 10.76 lux. ΘΚΠ the world > matter > light > illumination > [noun] > unit of illumination > candela > foot-candle candle-foot1892 footcandle1906 1906 Illuminating Engineer 1 66/1 The term ‘foot-candle’..expresses but a vague idea to the average architect and engineer. 1951 J. M. Fraser Psychol. xvi. 200 For certain jobs..up to four hundred foot-candles (the equivalent of bright sunlight) have been tried. 2010 Frederick (Maryland) News-Post 7 Nov. m3/4 A 60-watt incandescent light bulb placed 6 feet above a worktable will deliver about 20 footcandles at the table surface. < 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。