Why is the sky so blue 20, why is the sky so 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.

Quite simply, it has to do with the wavelength of light, the longer the wavelength, the weaker the penetration, and the color of the place it fails to penetrate. The wavelength of green, blue, and purple light in the seven colors of sunlight, red, orange, yellow, green, blue, and purple is short, and the penetrating power is natural. They remain in the air to form a scattering phenomenon, that is to say, the sun's "white" light will be divided into green, blue, and purple light, but because the penetration of purple light is too poor, it can be well blocked by the air, and the penetration of green light is stronger than that of blue light, and the scattering is not as serious as blue light, so it will be covered by blue light, so the sky will become the color formed after blue covers green - azure blue.

Blue is the color of the ozone layer.

Sunlight is composed of seven colors: red, orange, yellow, green, cyan, blue, and purple. The wavelengths of light in these seven colors are not the same. Dust and other particles in the atmosphere have a stronger ability to scatter light in short waves, while blue light has a shorter wavelength, so it is scattered when it reaches the atmosphere.

As a result, the sky appears blue. Using the phenomenon of "scattering", you can explain the following celestial phenomena:

For example, the sky above you is blue, but where the horizon meets heaven and earth, the sky looks almost white. Why? That's because sunlight travels a lot farther through the air than it does if it falls straight from the sky—and it grazes with many more particles along the way.

These large numbers of microparticles scatter light many times, so it appears white and light blue. It is recommended that you do a little experiment to verify this: take a glass of water, put it in a dark background, put a drop of milk, and then take a flashlight to one end of the cup, and close to it, the light of the flashlight will appear pale blue in the water.

If you put more milk into the water, the whiter the water will become, because the light is scattered again and again by these numerous milk particles, and the result is white. It's the same as being white above the horizon. Since 79% of the earth's surface is made up of oceans, it is reflected and refracted to form a blue color on the surface of the sky.

Sky blue, sea blue, the song is sung like this, so the sky must be blue!

Popular Science: Why is the sky blue? Why is dusk so beautiful? Why are dark clouds black?

When sunlight enters the atmosphere, red light, orange light, yellow light and other long-wavelength color light can directly pass through the atmosphere to the ground, and blue light and other short-wavelength color light will be scattered, so that the sky is blue light in all directions.

Hope it helps.

Because the sky is blue, it is the earth that is so bright.

Wearing tinted glasses is not blue! This absolute professionalism is a bit more professional than anyone in Mexico!