these why yellow Colors Why is

Was ermöglicht Farben? (englischsprachig)

Hi,

"Why is the sky blue? Why is fire yellow? What about flamingos or emeralds?

Scholars have learned that all the colors in the universe originate from a mere fifteen fundamental physical causes. These causes appear over and over, lending color to the world around us. Some common causes seem logical -- for example, both light bulbs and candles are colored by incandescence -- and others are surprising -- did you know that the colors of peacock feathers and bubbles are both caused by interference?..."

http://webexhibits.org/causesofcolor/index.html

Ciao,
Romana