| Change log entry 29787 | |
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| Processed by: | richwarm (2010-07-17 12:11:01 UTC) |
| Comment: |
<< review queue entry 29672 - submitted by 'richwarm' >> 光柱 has the sense "light beam" *outside* of the context of physics as well -- e.g. 探照灯射出一道长长的光柱划过天空。-- so ditch the (physics) tag. I can't find references to support "light cross" except C-E dictionaries which seem to have copied their definitions from each other (e.g. ABC, FLTR New Century, www.kejiyingyu.com, www.iciba.com, etc. ... and CC-CEDICT!). Indeed, I have no idea what a "light cross" is. It does not seem to be defined in Encarta, Webster, Wiktionary or Wikipedia "Light pillars are vertical pillars of light above and sometimes below the sun (or moon, Venus, or artificial lights) caused by many many reflections off the large flat face of horizontally falling plate ice crystals..." http://optics.kulgun.net/SunPillar/ See also http://en.wikipedia.org/wiki/Light_pillar When the light source is the sun, they are called sun pillars or solar pillars. The following entry is in EDICT: 太陽柱 【たいようちゅう】 (n) sun pillar; solar pillar Example of usage: 說明: 這極光看起來怎會如此靠近地平面呢? 上圖的影像可不是極光，而是附近的光柱，是個看似遙遠卻只不過是地區性的現象。 在大部分地區，只要夠幸運，民眾有可能看到太陽光柱，一道從太陽延伸出來的光柱，這是飄動的扁平冰晶反射來自高空的陽光所致。 通常這些冰晶在落至地面前就蒸發了，不過，在極為嚴寒的溫度下，這些飄動的扁平冰晶會在地面附近形成薄雪的型式，有時被稱為冰晶霧。 於是這些冰晶就會將地面上的燈光反射出柱狀光柱，就像太陽光柱般。 上圖中，造成光柱的彩色燈光環繞著美國．阿拉斯加州費爾班克斯市(Fairbanks) 的溜冰場。 http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap060305.html |
| Diff: |
- 光柱 光柱 [guang1 zhu4] /light beam (physics)/light cross (astronomy)/ + 光柱 光柱 [guang1 zhu4] /light beam/light pillar (atmospheric optics)/ + 太陽光柱 太阳光柱 [tai4 yang2 guang1 zhu4] /solar pillar/sun pillar (atmospheric optics)/ |