Look at the clouds and tell the story of the rainbow in the weather

Rainbow is an atmospheric light image caused by refraction, splitting, internal reflection and re-refraction. When light shines on raindrops at a certain angle, it will be refracted in raindrops, and light of various colors will deviate, among which violet light has the largest refraction, red light has the smallest refraction, and other light is in between. After being reflected by the trailing edge of raindrops, the refracted light will be refracted into our eyes through raindrops and the atmosphere. Because raindrops are suspended in the air, when we look up at the sky, raindrops on the same arc reflect different colors of light at the same angle, so we see the inner ultraviolet and red color bands, that is, rainbows. Most rainbows appear in the opposite direction of the sun. According to Arabic legend, the rainbow is the bow of god of light Goshah. When Goshah was resting,

Hang your rainbow in the clouds. For many years, people have admired the rainbow, spread the myth of the rainbow, and tried to uncover the secret of the rainbow. As early as the Northern Song Dynasty, China had a scientific explanation for the rainbow in the sky. At that time, Shen Kuo quoted Sun as saying in Mengxi: "Hong, Japan, China and Shui Ying also. There is sunshine and rain. " In China, the rainbow can be regarded as a two-headed snake and a dragon, while Bai Hong's crossing the sky is regarded as an ominous sign.