Tao Hong Huang Gan imperial vault Huangtian accumulated nine days of anger.
Blank, blue, blue, green, floating, empty, empty, empty, empty, green, empty, blue.
The sky is empty, the spirit is empty, the spirit is empty, the spirit is bright, the spirit is bright, the sky is bright, the sky is static and the sky is clear.
Qilian Ganqiu Ganyu Gan Yuan Qing Bing Qing Cang Han Qing Qing Hao Qing Kuang Qing Qing Qing Qing Bi.
Extended data:
About the color of the sky
The reason why the sky is blue is that sunlight is made up of seven kinds of light. Of the seven kinds of light, cyan, blue and purple have shorter wavelengths, and light waves are most easily scattered by air molecules and dust in the air, so when sunlight passes through the atmosphere, most of the three kinds of light are scattered.
Purple is almost invisible in the atmosphere, because most purple light is absorbed when scattered, and the human eye is not sensitive to purple.
The color of the sky (that is, the color of the atmosphere) is actually the composite color around the blue in the spectrum, which we call "blue".
If there is no atmosphere, the sun we see is a very dazzling fireball in the dark space background, and astronauts in the space station can also see this scene, because sunlight loses most of the blue region of the spectrum through the atmosphere, and the sun we often see through the atmosphere is yellow.
When blue light and yellow light are mixed together, it is white light (sunlight that has not passed through the atmosphere).
The sky in rainy days is gray, because thick clouds mainly reflect sunlight, so the light is weaker than sunny days, and the sky looks darker than sunny days.
When sunlight passes through the thick clouds again, the sky looks gray in rainy days because of the high water content and dust in the clouds, and the sunlight mainly presents the color of dust and small water droplets or small ice crystals after reflection.
Reference: Baidu Encyclopedia-Sky