Why is the sky gray? 20 points

Gray is because of air pollution. There is a lot of dust in our low altitude, which reduces the ability of blue (blue light) in the atmosphere to reach the human eye through low altitude, so it turns from blue to gray.

If you ask why it is blue, it is because the atmosphere itself is colorless. The blue of the sky is a picture created by atmospheric molecules, ice crystals, water droplets and sunlight. When sunlight enters the atmosphere, long-wavelength colored light, such as red light, has great transmission power and can penetrate the atmosphere and shoot to the ground; However, violet, blue and cyan light with shorter wavelength will easily scatter when it touches atmospheric molecules, ice crystals and water droplets. Scattered purple, blue and cyan light fills the sky, making it appear blue.

Why does the sky turn gray?

Because my heart is broken.

Why is the cloudy sky gray (its optical principle)?

1. Scattering of light can be divided into scattering caused by air molecules and scattering caused by tiny dust.

2. When the weather is clear or there is less pollution, when the sun rays pass through the atmosphere, they will be scattered by air molecules. Only the blue-violet light with short wavelength is scattered when it meets air molecules (similar steps are short, but they cannot pass through air molecules, so they are scattered), so the sky is blue.

When the weather is cloudy or seriously polluted, there are many clouds or dust. When the sun's rays pass through the atmosphere, they are mainly scattered by tiny dust. In this case, all kinds of wavelengths of light will be scattered (the wavelengths of seven kinds of visible light are smaller than the diameter of dust and cannot pass through), so the sky is gray.

Ask for a song: Lyrics: Why the sky turns gray and why birds have no wings. Birds revolve around the sun.

It seems that Sitar tan sang "Give you some color"

Why is the sky gray and why is the river no longer clear? What are the next lyrics?

why

Why is the sky gray and why are the rivers no longer clear?

Why is the sun gone?

why

The earth is angry.

Why do flowers wither?

Why don't birds sing?

Why can't I find the stars?

Why has everything changed?

Why is this?

why

Does the fairy tale world really exist?

Where did the beautiful blue sky and white clouds go?

This is because of you, and that is because of me.

Open hands

Embrace nature.

The earth will smile at us.

Our home will become beautiful.

Why is the sky 20 minutes gray?

Because there are talents.

Why is the first sentence of the lyrics gray? Who sang that song?

The following is the answer ~ Song title: Love is not in Singer: Clown The sky is gray, and I can't see anything. How can I forget my happiness? I would like to be a protective color for your happiness. Do you still remember the song that raindrops wet our future, leaving a blank diary to stop recording? My love has been missing a piece. I don't understand your existence. Raindrops fall, wet our future, leaving a blank diary to stop recording. My love missed a beat. I know I couldn't come back before I am willing to be a protective color to give you happiness. Do you remember the song that raindrops fell and got wet? There is only a blank diary left in our future. I know I couldn't come back before

Hope to adopt

Why does pm2.5 cause the sky to turn gray?

The particle size of PM2.5 is about 2.5 microns, while the wavelength range of visible light is 0.4-0.7 microns, which is smaller than PM2.5, so it is not surprising that PM2.5 will block the transmission of normal light and look gray. Of course, this is when the weather is sunny and dry. Even if the sky overhead looks blue, when you pay attention to the sky near the horizon, you will still find gray. When the air humidity becomes higher, the situation will get worse. At this time, PM2.5 particles will become excellent condensation nuclei, and a large number of water molecules will attach to them, becoming gel particles of PM 10 or even PM 100. At this time, haze can easily turn into fog. This is why we often talk about smog together. At this time, the sky will look even darker. Beijing has always been like this.