Question

How dust and suspended particles act as a nucleus for condensation of water

Answer 1

Dust and other particles present in air causes the water droplets in clouds to become smaller, which leads to decrease in rainfall. Many scientists think t that large airborne dust particles would speed the formation of rain by forming giant cloud condensation nuclei and larger cloud droplets. Desert dust showed that dust particles contained very little water-absorbing matter, as a result, even large dust particles form relatively small cloud droplets.

Water droplets that form around dust grains and other aerosols, tend to be smaller than droplets that don't. The size of the water droplets in a cloud determines whether gravity will dominate over the tendency of the air molecules to keep the droplets suspended.

Dust and other types of aerosol particles blowing into clouds act as nuclei where water vapor condense to form cloud droplets. If a lot of dust enters a cloud, the water present there spread over many small droplets. These small droplets grow more slowly through collisions with one another to the size of a raindrop, and the cloud yields less rainfall .