Why is the sky light blue. Why is the sky blue?

First of all, understand how light works, as light travels from the sun, it moves up and down like ocean waves, and when the wavelengths come together, we appear as if they are white.

Because of the principle of dispersion of light.

Sunlight is composed of seven types of light: red, orange, yellow, green, cyan, blue, and violet. Among the seven types of light, cyan, blue, and violet wavelengths are shorter and are easily scattered by air molecules and dust.

1.The Tyndall Effect The Tyndall effect, proposed by Tyndall in 1859, laid the first steps for us to be able to correctly interpret the color of the sky. He found that when light passes through a transparent suspension with small particles, the blue rays with shorter light waves are more scattered than the red rays.

When a beam of white light is incident on the containment.

2.Dust or molecules? Tyndall and Rayleigh originally thought that the blue color of the sky had something to do with the scattering of light by small particles of dust or water vapor in the atmosphere.

Even today, there are people who mistakenly use these two principles to explain the blue color of the sky. Scientists later learned that if this theory was correct.

The main thing is that most of the earth's surface is oceans, and the oceans make the sky blue.

Because that's how the earth is!!

Look at it in the dictionary, our elementary school students are not composed of words: blue sky, white clouds? Are you a kindergarten child, what are you doing with it, neurotic! Looking for scolding...

Why is the sky blue?

There are many answers on the Internet, but they are all very wordy, and the brief answer is as follows: the visible light in sunlight, arranged in decreasing wavelength order, has red, orange, yellow, green, blue, indigo, violet - 7 monochromatic lights - what we usually call 7 colors of sunlight.

When different wavelengths of light pass through the atmosphere, they are affected differently by the atmosphere, and this effect is called scattering, which is like a high-speed stream of water sprayed onto a barbed wire fence and splashed in all directions – changing its original path. Light with longer wavelengths, such as reddish-orange, easily bypasses those air particles in the atmosphere and most of them reach the ground directly; Short wavelengths, such as indigo violet, are mostly blocked out of the atmosphere due to poor diffraction performance; The blue light, which is neither long nor short, and some green light (the proportion of blue light accounts for a large proportion), has the strongest effect on the scattering of air particles in the atmosphere, so it makes the atmosphere appear blue (of course, there is no air pollution).

If you look out of the porthole in an airplane, you know that the sky there is not azure, but dark blue, and those are the violet lights that are blocked in the stratosphere.