When does the sunset glow appear?

Sunset appears around sunset in the evening. The formation of sunset glow is due to the scattering of light by air. When sunlight enters the atmosphere, it will scatter when it meets atmospheric molecules and particles suspended in the atmosphere.

these atmospheric molecules and particles themselves do not emit light, but because they scatter sunlight, each atmospheric molecule forms a scattered light source.

Extended data

Related phenomena:

1. Caixia: Caixia is caused by the scattering of air molecules, just like the blue of the sky.

2, solar halo: when sunlight passes through ice crystals in clouds, it is refracted to form a light phenomenon, which is annular around the sun and is colored. The appearance of solar halo often indicates that the weather will change to some extent.

3, flaming clouds: flaming clouds belong to low clouds. When the sun just comes out, or when the sun is about to set in the evening, the clouds on the horizon are often red, like fire.

Baidu Encyclopedia-Huoshaoyun

Baidu Encyclopedia-Caixia

Baidu Encyclopedia-Sunset