This morning, there was a sun halo on the Bund of Shanghai, and people who exercised early stopped to watch. Do you know what is the sun halo? How is it formed? Follow Xiaobian to feel the magical changes of nature.
Solar halo, also known as round rainbow, is an atmospheric optical phenomenon. When sunlight passes through cirrus clouds, it is refracted or reflected by ice crystals.
The appearance of color halos around the sun often indicates certain changes in the weather.
The greater the ice content in the cloud, the smaller the 'halo' shape after sunlight refraction, and the more significant the halo is, which is easy to be observed; otherwise, the 'halo' cannot be formed, or even if formed, the phenomenon cannot be clearly observed on the ground.