男友太凶猛1v1高h,大地资源在线资源免费观看 ,人妻少妇精品视频二区,极度sm残忍bdsm变态

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





 
天空為什么是藍色的?(通訊員稿)
[ 2006-09-11 13:46 ]

蔚藍的天空總會給人們帶來無盡的遐想,每當我們仰望浩瀚無垠的蒼穹,都會深深的陶醉在那片神秘而悠遠的藍色中。不過,天空為什么是藍色的呢?這里邊可是大有玄機。想知道嗎?快快讀下去吧!

天空為什么是藍色的?The blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by the air.

However, much of the shorter wavelength light is absorbed by the gas molecules. The absorbed blue light is then radiated in different directions. It gets scattered all around the sky. Whichever direction you look, some of this scattered blue light reaches you. Since you see the blue light from everywhere overhead, the sky looks blue.

As you look closer to the horizon, the sky appears much paler in color. To reach you, the scattered blue light must pass through more air. Some of it gets scattered away again in other directions. Less blue light reaches your eyes. The color of the sky near the horizon appears paler or white.

Rayleigh scattering:雷利散射

molecule:分子

radiate:輻射

scatter:散射

(北京林業大學通訊員林宇供稿 英語點津 Annabel 編輯)

 
 

 

 

 
 

48小時內最熱門

     

本頻道最新推薦

     
  International Day of Peace(國際和平日)
  September 11
  An interview
  When is a bug not a bug?
  Professor and the editor






主站蜘蛛池模板: 乌鲁木齐县| 北辰区| 米林县| 福安市| 珠海市| 铜鼓县| 原平市| 巴东县| 兴海县| 庄河市| 阿勒泰市| 阳谷县| 海阳市| 延川县| 晋中市| 莲花县| 盐边县| 宝鸡市| 鄂伦春自治旗| 腾冲县| 民丰县| 嫩江县| 舟山市| 靖安县| 海宁市| 沈阳市| 镇宁| 石景山区| 兴隆县| 庄河市| 阿巴嘎旗| 夏邑县| 嘉义市| 广河县| 南平市| 吉林省| 唐海县| 甘德县| 烟台市| 遂昌县| 西安市|