Tianban Zhuxia (scientific explanation + philosophical inspiration)

Word Science Tian Banzhu Duan

On a hot feast day, every evening when the sun sets, a red glow will appear on the horizon, which is extremely beautiful. The heat and fatigue of the day seemed to fly to the sky with this beautiful glow at this moment. But this beautiful scenery never seems to appear at noon. Why? 2 Why is it red or orange? Are there no other colors? Let’s take a look.

Scientific explanation

The formation of sunset glow is due to the scattering of light by air. When sunlight enters the atmosphere, it is scattered when it encounters atmospheric molecules and particles suspended in the atmosphere. These atmospheric molecules and particles themselves do not emit light, but because they scatter sunlight, they are equivalent to scattered light sources.

When sunlight enters the atmosphere, the longer-wavelength colored light, such as red light, has a strong rapid-fire power and can be shot to the ground through the atmosphere; while the short-wavelength purple, blue and cyan light encounter atmospheric molecules and ice crystals. It is easy for scattering to occur when there are , water droplets, etc. The scattered purple, blue, and cyan light fills the sky, making the sky appear blue.

The sun enters the atmosphere in the morning and evening, so the distance it takes for them to penetrate the atmosphere is much longer than at noon. Among them, red light has the strongest penetrability, and other light due to scattering and Large absorption and other effects are weakened, so it looks red. At noon, the direct penetration distance of the sun into the atmosphere is much smaller, and the corresponding scattering and absorption are much smaller, so other lights besides red light are also preserved. , so it still looks like the white light of Fuhuiguang

Small application

As the saying goes, "The morning glow will not go out, but the sunset will travel far away." That is to say, the bright red alpenglow appears in the morning, indicating that there are many droplets in the atmosphere, indicating that the weather will turn rainy. If there is a fiery red or golden sunset glow, it means that there are no clouds in the west, and the sunlight can penetrate through to form the sunset glow. Therefore, it indicates that the weather is about to clear up. Colorful clouds sometimes appear on the horizon around sunrise and sunset. The acidity seen in the eastern sky before and after sunrise is called morning glow, and the one seen before and after sunset is called sunset glow.

Philosophical meaning

Looking at the horizon, the police lights we see are so dazzling. This reminds us of the firelight when the Shenzhou soared into the sky, the Chinese people's dream of flying into the sky for thousands of years!

In the past sixty years, the Chinese nation has given birth to many aerospace spirits. The traditional aerospace spirit: self-reliance. , Hard work, vigorous collaboration, selfless dedication, rigor and pragmatism, and the courage to climb. The spirit of "two bombs and one satellite": love for the motherland, selfless dedication, self-reliance, hard work, vigorous collaboration, and the courage to climb. The spirit of manned spaceflight: special ability to endure hardship, special ability to fight, special ability to survive, and special dedication.

We will live up to the entrustment of our predecessors, inherit and carry forward the aerospace spirit, bravely shoulder the important responsibilities of the times, build strong cultural confidence, enhance national independence, and forge the soul of national rejuvenation.

Looking at the starry sky, confused, not knowing where to go, wishing that the sky was half an ark, like a painting of Zhuxia!