What happened to the sudden appearance of a rainy night red sun? It rains in Mao Mao at 6 pm in winter. I was walking on the road when I suddenly found someone behind me.

There are a lot of water molecules in the air after the rain. When sunlight passes through it, many other colors of light are absorbed, refracted or reflected. Only red light stubbornly passes through the atmosphere and water vapor to reach the ground, which is extremely penetrating. In the meantime, most of the blue-purple light is refracted in the atmosphere and water vapor, while most of the sunlight reaching the ground is red and orange, so the sun looks red.