Why does the sky turn so red?

Category: Education/Science>> Science and Technology

Problem description:

I am in Xiamen, and the sky has been unusually red in the evenings in the past few days, right? Is it related to Typhoon Cimarron?

I remember one year, the sky was so red, and there was hail. Is this a sign of unusual weather changes?

Analysis:

Generally, the color of the sky in the evening is red.

The reason why the sky we see during the day is blue is because of the influence of the atmosphere on The scattering of light has a characteristic: light with shorter wavelengths is easily scattered, while light with longer wavelengths is not easily scattered. Blue light has short wavelengths, so it is easily scattered, and the sky appears blue. In the evening, because sunlight has to penetrate If the atmosphere is too thick, blue and purple light are scattered, leaving only red and orange light that can penetrate the atmosphere and enter our eyes.

So the color of the evening sky is generally red.

However, it is not ruled out that changes in the density of the atmosphere during abnormal weather may have a special impact on light, so abnormal weather should still have an impact on light.

But it seems like a sign. . It doesn't make sense. It's possible that there will be abnormal weather first and then it will turn red in the evening.