原来昨天看到的是传说中的double rainbow,双彩虹！
我人生中第一次的双彩虹，却被我忽略了！请注意以下照片．．．
“彩虹的形成是由于空气中的小水滴把阳光经过折射形成的。 当光经一次折射和一次反射后形成的是一个正彩虹。有时，光会形成两次折射和一次反射后也会形成彩虹，不过这个彩虹是反的。 在特殊情况下，也会两种彩虹同时出现，这就是双彩虹。空气中的小水珠把彩虹再反射一遍，第二条彩虹比第一条要淡很多，并且是第一条的倒象。正像称之为虹，倒像称之为霓，也叫副虹。”
“Every once in a while, if you get lucky, you may see a second rainbow on the outside of the first, brighter rainbow. This is the "secondary rainbow" which occurs when raindrops high in the atmosphere refract and reflect light back to the viewer.
These raindrops are higher than those which cause the "primary rainbow" and are special because they internally reflect the incoming sunlight twice rather than just once. ”
These raindrops are higher than those which cause the "primary rainbow" and are special because they internally reflect the incoming sunlight twice rather than just once. ”
看到吗？
彩虹就是那么美丽，却那么短暂...
双彩虹更是让人更着迷！
下一次的双彩虹会在什么时候出现在我面前？
或许一次就足够了，让人回味无穷！
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