A magnificent solar halo appeared over the Forbidden City. How did this phenomenon come about?

Today, let's talk about how the phenomenon of daily pregnancy comes into being.

Solar halo is a light phenomenon formed by the refraction of sunlight on cryolite in clouds. It is annular around the sun, and when the sun is pregnant, it indicates that the weather will change.

The transit of the sun is also a very rare weather phenomenon, and there are total halos and intermittent halos. The transit of the sun is a colorful or white halo around the sun formed by cirrus or cirrus.

Sunlight is received when it passes through cirrus clouds, and solar halo is formed by refraction or reflection of ice crystals. When sunlight hits the ice crystals in cirrus clouds, it is refracted by two layers, so the sunlight is scattered into various colors in different directions.

In fact, when there is cirrostratus, there are countless ice crystals floating in the sky. All the ice crystals in the same circle around the sun can refract the light of the same color into our eyes, thus forming an inner infrared purple halo.

When cirrus clouds composed of ice crystals appear in the sky, one or more colored rings often appear around the sun, and sometimes even many white or colored rings and points appear. These points and rings are called solar halos.

When the viewing angle corresponding to the radius of these rings is between 22 degrees and 46 degrees, we can observe the transit of the sun with the eyes of the sun. If the ice crystal content in the clouds is large, the shape of the solar halo will become smaller and more obvious after sunlight irradiation, and it will be easier for us to observe. But if the ice crystal content in the cloud is less, there is no way to form the solar halo phenomenon, or even if it does.

Moreover, most solar events will occur in spring and summer, and there is also a folk proverb that solar halo is a phenomenon? It rains in the middle of the night and windy at noon. If there is a solar halo, it will definitely appear in the middle of the night. If there is a lunar halo at night, there will be wind at noon the next day, so the sun and the moon are also precursors to predict weather changes to some extent. If there is a solar halo, the weather is likely to turn cloudy or rainy.