Why isn t the sky red? What is the situation when the sky is red

The sky is blue, the sky, the best is blue. If it's red, then it's heavily polluted, and people won't be able to live.

The sky is red and it is sunset. According to the Rieley scattering theorem, transmitted light is inversely proportional to the fourth power of the wavelength of light, that is, the longer the wavelength, the less likely it is to be absorbed, so the blue-violet light with a shorter hail length is absorbed, while the red light with a longer wavelength is reflected more, and the sky at night is mostly red.

Sunset: Sunset, pinyin wǎnxiá, is a Chinese word that refers to the colorful rainbow that appears on the horizon before and after sunset. Refers to the rainbow that appears at sunset. Tang Lu Zhaolin's "Ancient Meaning of Chang'an".

Poem: "The dragon title treasure covers the sunrise, and the phoenix spits tassels with the sunset." Qing Shen Fu's "Six Tales of Floating Life: Memories of the Boudoir": "The smoke rises everywhere, and the sunset is rotten. "Cao Yu's "Thunderstorm".

Act I: "She feels that her summer has passed, and the sunset of her life is about to darken".

There are several reasons for the red sky:

1.Volcanic eruptions.

If a volcano erupts, it does have a red sky. Liri Tonga in January this year.

After a volcano erupts, the sky appears celestial red. This is mostly aerosols.

As a result, after the eruption of a volcano in India in 1815, the local aerosols drifted for several months and finally drifted to the United Kingdom, resulting in the phenomenon of red skies in the United Kingdom. However, the hail and volcanic ash did not affect our country and the surrounding areas at all.

2.Forest fires. The four-month massive bushfires in Australia have also sent blood-coloured skies to some small towns, and the ashes of the Grey World Hall have been filled with embers.

You can see the horror of that time through **. If this is something that happened a long time ago, there is no **, only a similar text that says "one day the whole sky is red, and the land is full of fire", then the fungus will definitely not believe it.

San Francisco, USA.

Also because of the wildfires, there is a red sky. This is mainly due to the haze and fog of the wildfires, which form a very thick barrier that blocks the sunlight and prevents the short-wave light from being scattered. However, there were no major wildfires near Zhoushan, so the cause was ruled out.

3.**。**On the eve there will be some strange phenomena more or less.

For example, the unusual activity of animals, clouds, etc., but it is true that you have never seen a red sky before. Although the current technology cannot accurately perform the ** before the earthquake, the equipment of the ** bureau can sense the area after the earthquake. After the red sky appeared, the local geomagnetic calm was still calm, and it could not be a geomagnetic anomaly or aurora.

4. Scattering and refraction of light. air temperature and local atmosphere.

The density of the air caused by the moisture content of the search.

Otherwise, the refraction and diffuse reflection of sunlight will be intensified. The response from the local weather bureau was a "blood-colored sky" due to the scattering and refraction of light, but the source of the light is not clear at this time. Rayleigh scattering.

The law also explains this phenomenon very well.

The red sky is a phenomenon of rainbow glow.

It is a kind of light phenomenon similar to a rainbow, which occurs in the morning and evening, and is not as regular as a rainbow, as random as a spilled paint. It's like an abstract painting.

All the same, there is a hazy beauty. Generally, the morning is called "morning glow", and the cloud itself is dull in color and huge in shape, but the sky is in the sky showing an elegant rose color; In the evening, it is called "sunset", also known as "fire clouds, the color is red, the shape is changeable, and the cloud body is small.

According to the Rieley scattering theorem, transmitted light is inversely proportional to the fourth power of the wavelength of light, that is, the longer the wavelength, the less easy it is to be absorbed, so the blue-violet light with a shorter wavelength is absorbed, while the red light with a longer wavelength is reflected more, so the sky is mostly red in the morning or night.

Rainbow and weather:

In ancient times, there was a saying that "the morning glow does not go out of the car cover door, and the sunset travels thousands of miles", because the morning glow is mostly cumulus clouds.

caused by the very easy development of cumulonimbus clouds.

The sunset is mostly caused by light cumulus clouds, which do not cause precipitation, and generally indicate that it will continue to be sunny in the next few days within a certain range, which is conducive to travel.

The above content reference: Encyclopedia - Sunset.

When the clouds on the horizon are dyed red, the sky is more like red silk.

Often when the slag ears are closed at night, I see the clouds in the distance turn into a fiery red color, in fact, this is a fiery cloud, which can also be called the sunset. The reason for the formation of the red-red color is actually because of the dispersion of light, which absorbs the sun's rays, which is why I see the fiery red. It's a magical natural spectacle.

It's beautiful.

It is not uncommon to see clouds dyed red by the sun's rays, mainly because of the scattering of light by the air, and the atmosphere also absorbs some of the sun's rays, which emanate from the distant surface of the sun to the surface of our earth.

When the clouds in space are dyed red like fire, we also call them fire clouds.

Burning clouds generally appear in the east sky in the morning or in the west sky in the evening, it is due to the irradiation of the sun, under certain conditions, the natural scene that occurs by refraction, the clouds are fiery red, very spectacular and beautiful, also known as morning glow or sunset.

There is also a saying that the folk look at the color of the sun to identify the weather, that is, if the color of the sun is just red, it will turn black, called the flooded people dug, the morning glow is flooded in the afternoon there may be rain, the evening glow is flooded, there may be rain at night or the next day.

It has to do with the light absorbed by the nitrogen and oxygen atoms in the air.

1. Why red and not other colors?

According to the Rieley scattering theorem: transmitted light is inversely proportional to the fourth power of the wavelength of light, that is, the longer the wavelength, the less easily it is absorbed, so the blue-violet light with a shorter wavelength is absorbed, while the red light with a longer wavelength is reflected more, so the night sky is mostly red.

2. **Shirt shed light?

One explanation is the light refracted by the sun, and the other is the light from the ground.

Personally, I think it's because there are more lights, because the sky is especially red on snowy days.