How many colours are in the rainbow?

http://tomscott.com - http://twitter.com/tomscott - Yes, there are more than seven; but they include a few colours that most people can't see, too. read more

Therefore, the number of colours of a rainbow is variable. If, however, the word rainbow is used inaccurately to mean spectrum, it is the number of main colours in the spectrum. The question of whether everyone sees seven colours in a rainbow is related to the idea of Linguistic relativity. read more

If a rainbow is passed through a second prism, the separated light can be re-combined into white light. Sometimes the different colors blend with each other, making it difficult to see each color independently. read more

There are seven colors in the rainbow: red, orange, yellow, green, blue, indigo and violet. Roy G. Biv. Portrait of Sir Isaac Newton by Godfrey Kneller. Awesome rainbow hairstyling courtesy of Azael Carrera. read more