Scattering of light

On some days, clouds cast huge shadows in the sky. Sometimes these are very impressive.

When the sunlight penetrates the fine fog, it sometimes conjures interesting shadows in the air.

When the dew lies on the fields in the morning, one can observe the phenomenon of the "glory".

The evening or morning red can shine brightly and are probably the best-known atmospheric phenomena. But why is that?

When small particles are present in the upper atmosphere, the so-called purple light can often be observed.

The phenomenon is so well known that it is even used in the English language: "Alpenglow". But when do the Alps actually glow?