Well, summer has arrived, and a typical afternoon will feature beautiful structures high in the sky. Towering upright storms that sit and dump heavy amounts of rainfall are pretty common for this time of year, but what makes them so white and pure looking?

Clouds are made up of water droplets. Water droplets tend to scatter light equally, making the appearance white. All of the visible colors of the spectrum become scattered in a process called "Mie Scattering".

When the cloud gets real high or thick, sunlight becomes reduced, thus giving the cloud more of a grey type of appearance.