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2012年12月10日,上海出现了“三个太阳”奇观,有好事者唯恐天下不乱,把这种现象和“世界末日”联系起来,这到底是怎么回事呢?“三个太阳”奇观其实是幻日现象,是大气的一种光学现象。在天空出现的半透明薄云里面,有许多飘浮在空中的六角形柱状的冰晶体,偶尔它们会整整齐齐地垂直排列在空中。当太阳光射在这一根根六角形冰柱上,就会发生非常规律的折射现象,即为“幻日”现象。
On December 10, 2012, a miracle of “three suns” appeared in Shanghai. What happened when there was a good person who feared that the world would not chaos and linked this phenomenon to the end of the world? The “three suns” wonders are in fact illusion days and are an optical phenomenon of the atmosphere. In the translucent thin clouds that appear in the sky, there are many hexagonal columnar ice crystals that float in the air, and occasionally they are neatly arranged vertically in the air. When the sun shines on the root of a hexagonal icicle, there will be a very regular phenomenon of refraction, that is, “magic day” phenomenon.