How do dark clouds form

Dark clouds are formed by condensation of fog droplets. Dark cloud refers to the cloud whose color changes after the fog droplets condensed by saturated steam and supersaturated steam in the white cloud become larger and larger. It is a natural phenomenon. There are many kinds of dark clouds, such as stratus clouds, isolated cumulus clouds, and wavy clouds. How do dark clouds form

Dark clouds are black because of the accumulation of fog droplets and the transmission of light, which makes the white clouds slowly turn black or gray black.

The formation of clouds is mainly related to water vapor in the atmosphere. It is a visible polymer floating in the air composed of small water droplets or small ice crystals formed by condensation of water vapor when it is cooled and liquefied.

Clouds of different colors in the sky are caused by the scattering of sunlight in the atmosphere under different meteorological conditions. Because the thickness of clouds is different and their ability to block sunlight is different, different colors will appear. （WuYunShiZenMeXingChengDe）