3 Answers

a symbol of peace sent from god after the flood as a sign of a covenent.

The thing that hangs in God's office to remind him not to recycle his water softener again.

A rainbow is created as a result of the rays from  sunlight passing through  vapors of water in the sky.  Each vapor  becomes a prism like a mirror breaking down sunlight into individual colors creating a spectrum. If you notice, when you see a rainbow, the sun is out and it is probably sprinkling outside. Kind of cool to figure that two very beautiful creations can create such a divine spectacle. GOD made a point to remind us that HE will never destroy the earth with water ever again. The next time will be fire.