# Why don't clouds fall? [duplicate]

Well I do know that they sometimes fall as rain, but my question is why don't the droplets fall as soon as they condense from steam to cloud.

Clouds are white by the process of Mie scattering so the particles are on the order of light wavelength ~$0.5 \mu m$, although small would a particle of this size not slowly fall to the ground?

When a cloud does rain many of the rain drops fall at the same time what is physically happening to the droplets to encourage them to join into large drops that fall?

## marked as duplicate by John Rennie, Abhimanyu Pallavi Sudhir, Kyle Kanos, user10851, DilatonFeb 18 '14 at 16:30

• this ppt presentation goes into the details of drop formation, duratation and fall google.gr/… – anna v Feb 18 '14 at 15:39