How are colorful auspicious clouds formed?

Under suitable weather conditions, sunlight is diffracted by small ice crystals and water droplets in the cloud, thus separating the solar spectrum and forming colorful light, generally ultraviolet and red.

In the part near the sun, the colors are white, blue and purple, and in the part far away from the sun, the colors are red and orange.

Caiyun? What are the conditions for emergence? Caiyun? Different from the cause of rainbow and solar halo, it is a natural phenomenon caused by sunlight diffraction.

So? Caiyun? The emergence of cloud also needs to meet certain conditions: 1. The clouds are thin, or the edges of large clouds are thin;

2. Clouds are mainly composed of uniform small ice crystals and small water droplets, generally dominated by relatively low-lying cumulus clouds or cirrocumulus;

The weather is fine and the visibility is good. When the wavelength of cloud and light is similar or small, obvious diffraction phenomenon can be observed.

Where does the cloud above belong? Cumulus? After the sun shines, because? Diffraction? Form the aperture of inner ultraviolet red, which is the scientific name? Hua? . When sunlight passes through a thin cloud suspended with water droplets, the water droplets diffract the passing light in different directions, and the diffracted light interferes with each other, and bright light will be seen at the junction of light waves, while the light at the offset is dark. The diffraction angles of different colors are different, and the bright area of one color light appears in the dark area of another color light, gradually forming a color sequence. The farther away from the sun, the lighter the color. Because clouds are distributed in irregular sheets, irregular sheets of colorful clouds are produced.

Most rainbows are perfectly round, but because rainbows usually appear at 40? To 42? Angle, therefore, it is difficult for people to see the part below the horizon, and what they see in their eyes is mostly semi-arc. With the emergence of aerial photography technology, people can now see a perfect and spectacular circular rainbow from the air; Besides, standing on the top of the mountain with a wide view, you can also see a round rainbow, such as the Jinding of Emei Mountain? Buddha light? . Although the rainbow, Caiyun? Why do people expect it? Good omen? It doesn't matter much. The appearance of this phenomenon at least shows that the environmental meteorological conditions and air quality are good that day.