The popular science content of this article will reveal the dark conspiracy behind this ancient childhood problem: Why is the sky blue?
You're going to be shocked what I'm going to say next, but it's true. Although a person's life is strange and unpredictable, one thing will never change: the sky is blue. The song will sing about the blue sky, the poem will praise the blue sky, and even the innocent children will not be able to help but ask why the sky is blue. But I'm going to tell you an amazing truth: the sky isn't blue!
In order to unravel this mystery, we first need to know what the nature of light is. Once I was breeding between breeds, I mentioned that scientists are very keen to classify things, or group things. Based on what I said in that experience, what is radiation? If you can list all the different kinds of radiation in the universe and arrange them from low to high, you will know what the electromagnetic spectrum, or EM spectrum, is in the mouth of scientists.
There is a lot of radiation in one place near the center of the spectrum, which scientists classify as "visible light." That part is further divided into another part, called "color", which contains red, orange, yellow, green, blue, and purple.
<h1>The ups and downs of the radiation</h1>
When we think of radiation, we think of it either moving like a string of particles or moving like a wave. It's like traffic in a bustling street market, where the behavior of one car can affect the traffic situation of the entire traffic flow.
Illustration: Blue atmospheric beam line particle divergent radiation map
Why do some radiations look red and some look blue? This is due to its wavelength. Electromagnetic waves travel through the universe, like a series of peaks and valleys in motion, (professionally called peaks and troughs, but peaks and valleys are more reminiscent of that picture.) The distance between a pair of peaks or a pair of valley points we call it a wavelength. Red light is a radiation with a wavelength between 620 and 750 nanometers. How small is the nano? I'll give you an example and you'll know. A piece of paper is thin enough, and the nano is its 1/100000! Unlike red light, the wavelength of blue light is between 450 and 495 nanometers.
The results of the study found that the wavelengths of blue and violet light are exactly the lengths that can quickly enter the particles, which allows them to become part of the atmosphere. When light from the sun passes through the atmosphere, blue and purple light are scattered by atmospheric particles, making the sky look blue.
<h1> Wait a minute</h1>
You must be wondering, if particles in the atmosphere can scatter blue and purple rays, then why isn't the sky purple? Well, I tell you, in fact, the sky also has purple, but the blue and purple in the sky are mixed together and we can't tell the purple with the naked eye. In fact, if you are a bee, a bird, or a butterfly, your eyes will see all kinds of wavelengths that the human eye cannot see, so the sky will also show different colors in your eyes.
Sky blue is a color similar to a clear midday sky that reflects off the metal surface. Morrie's new English dictionary is included: the term "sky blue" was first discovered in 1728 in an article in Farian Chambers' encyclopedia called "silver." In fact, many writers have used this word to describe color before Chambers. For example, in the 1704 book Of Travel and Travel, published by the British writers Ornsham and John Churchill, volume II, p. 322, John Neuhof describes some flowers and says, "They have beautiful sky blue petals and yellow petals." The first conscious use of the word sky blue is in a 1585 book by Nicolas de Nicolas, in which he says, "The turban of a merchant must be the color of the sky." ”
<h1>Resources</h1>
1. WJ Encyclopedia
2. Astronomical terms
3. I don't want to be quiet anymore - quickanddirtytips
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