1934 65438+ Ancient City Xi 'an1On October 22nd and 23rd, before 9 o'clock in the morning, people saw an infinite halo around the sun with bright light and strange shape. After 9 o'clock, three suns hung side by side in the sky until 5 o'clock in the afternoon. The other time is 198 1. On April 18, residents of Dongfang Banqiao in Hainan Island got up in the morning and suddenly found five bright red suns in the light blue sky with a colorful ring in the middle.
Why are there many suns in the sky?
Scientists pointed out that there is a cloud about 7 kilometers from the ground, which is made up of ice crystals. Small ice crystals are regular geometric figures, which will be refracted when they are irradiated by sunlight. After the seven-color spectrum of the sun is refracted, human eyes will see different colors and shapes of halos due to different degrees of deflection. Concentric rings, horizontal bands and polygons are some complex halos.
When the horizontal light band intersects with the halo, a dazzling light spot appears at the intersection, which looks like a "sun" from a distance. A few light forks will produce several "suns". These false suns formed by the refraction of ice crystals are called "magic days" in meteorology. As long as you pay attention, you can see many suns in the sky. (Shenzhen Meteorological Bureau)