Why does the "flame cloud" appear in the morning and evening, and how is it formed?

The sun is a mixture of red, orange, yellow, green, cyan, blue and purple. Of these kinds of light, red light has the greatest ability to pass through the air layer, followed by orange, yellow and green light, and cyan, blue and violet light are the worst.

When the weather is clear, there are few raindrops hanging in the air. Almost all the red, orange, yellow and green lights pass through, and only blue, blue and purple light are blocked. Among these lights, blue light reflects the most, so the whole sky is "dyed" blue.

In cloudy morning or evening, the air layer through which sunlight passes is thicker than that at noon. Among them, yellow, green, cyan, blue and purple are exhausted when they "walk" in the air not far away. Only red and orange light energy protrudes through the air layer and "dyes" the horizon into red, forming a fiery red cloud.

Extended data flame cloud belongs to low cloud category. 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, so they are called fire clouds. When there are fiery red clouds, the sky is completely rendered red under the setting sun, just like there is an erupting crater below, which is dazzling.

In summer, especially at sunset after a thunderstorm, flaming clouds often appear in the west of the sky. The color of flame clouds is generally red, and the appearance of flame clouds indicates that the period of warm weather, abundant rainfall, lush biological growth and prosperity is coming.

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