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上海师范大学爱心学校 趣味科学讲义
天在晴朗时显现什么颜色? 为什么? 太阳光里有七种颜色:红、橙、绿、黄、蓝、靘、紫。红光最强,橙、黄、绿也比较强,最弱的是蓝、靘和紫。当太阳光透过厚厚的大气层时,红光跑得最快,一下子穿过去了;跟着橙、黄、绿光也闯过去了;蓝、靘光的大部分却被大气层扣留下了,它们被大气层里的浮尘、水滴推来搡去,反射来反射去的,结果把大气层“染”成蓝色的了。
美丽的极光
面对这样的环境我们该做些什么?
为何下雪之夜大地十分宁静? ,[object Object]
我们在冬天能经常见到雪吗? 为什么?
[object Object],用手抓住飞行的子弹
  你能不能用花盆做一个冰箱, 在热天里保存饮?

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