Traditional Culture Encyclopedia - Photography and portraiture - Under what circumstances will a purple sky appear?
Under what circumstances will a purple sky appear?
The atmosphere at the top of the sky is thin, so the blue of the zenith is scattered in the sky. When the blue of the zenith overlaps with the red of the horizon, the sky appears purple.
Of the seven kinds of light, cyan, blue and purple have shorter wavelengths, and the light with shorter wavelengths is most easily scattered by air molecules and dust in the air, so when sunlight passes through the atmosphere, most of cyan, blue and purple will be 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.
Extended data
Sunlight is white light, which consists of red, orange, yellow, green, blue and purple light. Red, orange, yellow and other colors have long wavelengths, which can pass through small particles and molecules in the sky, while blue and purple have short wavelengths, which are difficult to pass through, so they are scattered in the sky.
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, there is more water and dust in the clouds. After reflection, sunlight mainly reflects the colors of dust and small water droplets or small ice crystals, so the rainy sky looks gray.
Baidu Encyclopedia-Sky
People's Network-Chongqing people's circle of friends is screened by purple sky? Xia Zi, the fairy, has come to find the Supreme Treasure?
- Related articles
- What are the characteristics of fisheye lens, wide-angle lens, medium-focus lens and telephoto lens?
- Young Fang Shiyu Jet Li actor list
- Case study of flower photography planning
- The luminous key of racing pigeon. Why use an electric car?
- Girls born after 2000 in Lishui left the countryside to become Hanfu designers. What are the prospects for this career?
- Friends circle, taking pictures in life, is the pixel of mobile phone enough?
- What is jk?
- What Spanish movies are worth recommending?
- What are the standards for beginner photography, shutter speed, focal length and OSI adjustment?
- Summary of young pioneers' activities