In which direction does the rainbow usually appear after a rainstorm?

Rainbow is an optical phenomenon in meteorology. When sunlight hits the raindrops in mid-air, the light is refracted and reflected, forming an arched color spectrum in the sky. There are different opinions about the seven colors of the rainbow. The most common scenery in China is (from outside to inside): red, orange, yellow, green, cyan, blue and purple. Western views are: red, orange, yellow, green and purple.

In fact, as long as there are water droplets in the air and the sun shines behind the observer at a low angle, an observable rainbow phenomenon may occur. Rainbow usually appears in the afternoon just after rain. At this time, the air is less dusty and full of small water droplets, and one side of the sky is dark because of rain clouds. However, the observer can see the sun, and there is no cloud on his head or behind him, so the rainbow will be easier to see. Another place where rainbows are often seen is near waterfalls. When the weather is clear,

Night rainbow is a rare phenomenon, which may appear in the night with strong moonlight. Because it is difficult for human vision to distinguish colors in the weak light at night, the night rainbow looks as if it is all white.