It was a white cloud just now, and now it s a dark cloud What is the way to explain it

Causes of the formation of white clouds:

When the sun shines on the Earth's surface, the water evaporates to form water vapor, and once the water vapor is supersaturated, water molecules collect around the dust (condensation nuclei) in the air, and the resulting water droplets or ice crystals scatter sunlight in all directions, which gives the appearance of clouds.

Causes of the formation of dark clouds:

In summer, under the hot sun, the surface water evaporates rapidly, making the air humidity higher and higher, and the temperature at high altitude is lower than that at high altitude. Thus, the surface temperature, water vapor first reaches a saturated and supersaturated state at high altitude.

There will always be some dust at high altitude, and these dusts will become condensation centers, so that saturated steam and supersaturated steam condense into fine water droplets; When the droplets are dense enough, they become visible white clouds; When the water droplets get bigger, the white clouds turn into dark clouds.

Both white clouds and dark clouds are made up of small water droplets. There is some difference between a white cloud and a dark cloud in terms of "water content", which can be understood as the water content of the entire cloud or as the water content of individual water droplets.

Both of these understandings have some basis. Dark clouds can fill the sky, but white clouds cannot. It can be seen that, in terms of the general trend, the water content of dark clouds is generally greater than that of white clouds.

However, a trace of cloud in the sky can be both white and dark, and large clouds can also have two possibilities: "white" and "black", and the huge white clouds in summer can turn into tumbling clouds in an instant, which cannot be explained by water content. If "water content" refers to "the water content of a single water droplet", then it is accurate.

The water vapor in the white clouds condenses many small water droplets, and the small water droplets get bigger and bigger, and they become dark clouds.

Usually when it rains, the clouds must be thick enough to allow the cloud droplets to gather into raindrops in a short period of time. This thick cloud obscures the sun, and it is a dark cloud. The white clouds are usually thin and transparent enough clouds, and the cloud droplets do not have the conditions to gather into raindrops, and generally cannot rain.

However, there are exceptions, such as cirrus and cirrostratus clouds (which all appear as white clouds) at high latitudes, which can drizzle.

Dark clouds are due to saturated steam in white clouds.

and the oversaturation and steam condense into the droplets after getting larger and larger, thus changing the color. dao

Specific causes: surface water evaporates rapidly under the scorching sun, making the air humidity more and more large, and when the temperature at high altitude is lower than the surface temperature, the water vapor first reaches the saturated state and supersaturated state at high altitude, and there will always be some dust at high altitude, which becomes the center of condensation, so that saturated steam and supersaturated steam condense into fine droplets.

When the droplets are dense enough, they become white clouds, and when the droplets get bigger, the white clouds become dark clouds, and when the water droplets in the clouds continue to grow, they become raindrops.

Because there is a lot of moisture in it, it absorbs a lot of light, and the sunlight can't pass through, so it looks dark

He was cloudy and rainy yesterday, and he read books and read books day and night.

The clouds are thin and have a strong ability to transmit light, so they look white. The clouds are thick, the light transmission is weak, and it looks black

Quite simply, clouds are like the world, where there is black and there is white.

Darkness can make people lose their vision.

The same too bright will be.

So there is a positive and there is a negative.

With black, we can tell people what white is.

A dark cloud is a cloud with positive and negative electrodes, and a white cloud carries only one type of electricity.

It's like why there are good people and bad people in the world.

The sky was full of clouds of different colors, some white as flocculent, some as black as black, some gray as grey, and some as red and purple. How did these clouds of different colors come to be?

The thickness of the various clouds we see varies greatly, with a thickness of up to seven or eight kilometers, and only a few tens of meters thin. There are many types of stratiform clouds that fill the sky, isolated cumuliform clouds, and undulating clouds.

Very thick stratiform clouds, or cumulonimbus clouds, where the light of the sun and moon is difficult to penetrate, and the clouds appear very dark; Slightly thinner stratiform and undulating clouds, which appear gray, especially undulating clouds, with more grayish colors at the edges of the clouds; Very thin clouds, light is easy to pass through, especially thin clouds composed of ice crystals, the filaments appear particularly bright in the sun, with a silky luster, and even if there are such stratiform clouds in the sky, ground objects will still reflect shadows in the light of the sun and the moon.

Sometimes the clouds are so thin that they are barely visible, but as long as one or several large rings are found near the sun and moon, it can still be concluded that there are clouds, which are called "Cirrostratus thin curtains".Isolated cumulonial clouds, which appear to be white because of the thicker cloud layer and the sunny side, where the light is almost entirely reflected; On the backlit side and its bottom, the light is not easy to transmit, and it looks gray and black.

At sunrise and sunset, because the sun's rays are obliquely shining through, passing through a very thick atmosphere, the air molecules, water vapor and impurities make the short-wave part of the light scattered a lot, while the long-wave part of red and orange is not scattered much, so when it is irradiated to the lower atmosphere, the long-wave light, especially the red light, accounts for the absolute majority, at this time, not only the sky in the direction of sunrise and sunset is red, but even the bottom and edge of the cloud illuminated by it also turn red.

Because the clouds are composed of water droplets, ice crystals, and a mixture of the two, the light of the sun and the moon will also cause all kinds of beautiful halos or iridescent colors when they pass through.

The clouds are in the form of small droplets of water, just like the fog we see on the face of the Sun at the Dichang banquet.

White clouds are relatively thin clouds, auspicious water droplets are relatively small, and most of the water droplets can reflect sunlight. Such clouds generally do not rain.

Dark clouds are thicker clouds, larger and more compact, and what we see is the bottom of the clouds, most of which cannot reflect the sun's rays. Such clouds are generally susceptible to chain rain.