A number of things have to happen if you want to see a rainbow. It has to be raining. The sun has to be shinning. And you have to have your back to the sun. The rainbow you will then see is formed by raindrops breaking up the sunlight into its various colours; red, orange, yellow, green, blue, indigo and violet. Disappointingly, the one colour you will not find is gold. There never has been a crock of gold at the end of the rainbow.
Something that you often see with a rainbow is a paler ‘secondary rainbow’. In the brighter one, red is on the outer edge and violet on the inner. In the secondary rainbow the colours are reversed.
Picture Credit : Google
