Somewhere Over The Rainbow

I seen a Beautiful Rainbow today, so big and pretty and colourful and bright.
My Son who is 9 months old has never seen one before so it was lovely to try and show him.

Rainbows must be the most beautiful thing in the sky.

After seeing a Rainbow, I wanted to find out about them as I don't really know much about Rainbows.

I looked on the internet to find out and this is what I could find...

In a "primary rainbow", the arc shows red on the outer part and violet on the inner side. This rainbow is caused by light being refracted while entering a droplet of water, then reflected inside on the back of the droplet and refracted again when leaving it.A rainbow is an optical and meteorological phenomenon that is caused by reflection of light in water droplets in theEarth's atmosphere, resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured arc.
Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.

In a double rainbow, a second arc is seen outside the primary arc, and has the order of its colours reversed, red facing toward the other one, in both rainbows. This second rainbow is caused by light reflecting twice inside water droplets.

Magical eh?