久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

您現在的位置: Language Tips> Easy English> Odd Question  
 





 
為什么熒光棒會發光?
[ 2006-09-15 11:09 ]

不知道大家有沒有玩過熒光棒。在黑暗中,熒光棒一閃一閃的,發出各種各樣的光。那么,你知道熒光棒是怎么發光的嗎?就讓下面這篇短文告訴你吧!

A phenomenon namedphosphorescenceis responsible for the light most glow-in-the-dark itemsemit.

Phosphorescence occurs when light absorbed by an object is slowly released and can be observed even after the light is removed. If not tampered with, the light the object emits is dim, and is always pale blue in color.

Chemists had a bright idea to spark interest in this phenomenon and to make it visually stimulating. They discovered that when they mixedfluorescentdye with the phosphorescent material, the object emitted a glowing, brighter green, or sometimes red, light.

The reason for this transformation is that fluorescent compounds absorb the light and rapidly emit it, giving the compounds a glowing appearance. This phenomenon occurs only in the constant presence of the original light source.

The phosphorescent material absorbs the light, and slowly emits a pale blue light, that in turn is absorbed by fluorescent dye. The light now emitted is green or red light, depending on the type of dye used.

The most commonly used phosphorescent material iszincsulfidemixed with copper, and the green fluorescent dye most likely is sodium fluorescein. The most likely source of red fluorescent dye isrhodamine. Paired together, the phosphorescent material and the fluorescent material produce a ghostly, glowing green or red light, and hours of enjoyment for young and for old alike.

phosphorescence: 磷光

emit: 放射、發出

fluorescent: 熒光的

zinc: 鋅

sulfide: 硫化物

rhodamine:玫瑰精,若丹明(一種紅色染料)

(英語點津 Annabel 編輯)

 
 
相關文章 Related Stories
 
 
 

本頻道最新推薦

     
  為什么下雪時天氣暖
  You are the smartest fish I've ever seen!
  Dog burger
  為什么老了脾氣好
  飛蛾為什么撲火

論壇熱貼

     
  開個題目大家扯:hotel & restaurant
  追求某人
  請教工商年檢如何翻譯
  How to translate “中國老字號”into English?
  "港股直通車"怎么翻譯?
  兩免一補怎么說?




主站蜘蛛池模板: 亚洲最大的视频网站 | 欧美日本一道道一区二区三 | 亚洲成人播放 | 怡红院免费的全部视频 | 男操美女| 国产成人综合网在线观看 | 欧美一级毛片免费播放aa | 国产成人久久精品麻豆二区 | 国产一区二区精品久 | 精品国产九九 | 男女性男女刺激大片免费观看 | 九九在线免费观看视频 | 国产免费影院 | 亚洲成年网 | 成人免费国产欧美日韩你懂的 | 久草免费小视频 | 日韩一级欧美一级一级国产 | 亚洲视频99 | 亚洲欧美国产精品 | 欧美日韩在线观看区一二 | 国产免费自拍 | 午夜成人在线视频 | 日韩在线视频不卡一区二区三区 | 114一级毛片免费观看 | 欧美一区二区三区国产精品 | 国产精品久久国产三级国不卡顿 | 成人国产精品视频频 | 波多野结衣一区二区 三区 波多野结衣一区二区三区88 | 精品精品国产自在久久高清 | 欧美日一级片 | 91最新网站 | 在线 | 一区二区三区四区 | 成人综合国产乱在线 | 免费看a级毛片 | 正在播真实出轨炮对白 | 91精品乱码一区二区三区 | 欧美亚洲在线观看 | 国产精品免费久久 | 日韩专区欧美 | 欧美视频一二三区 | 国产欧美一区二区成人影院 |