They are always in the same order. They appear to reverse in the secondary rainbow because the order starts at the top, not the bottom, of the arch. It is easiest to explain why by starting with the primary rainbow. read more
They are always in the same order because the placement of each color depends on the wavelength of the light. It will always put red on the outside of the phenomenon, and (in this order) orange, yellow, green, blue, (indigo, if you think it is there), and violet inside of red. read more
yes.the rainbow is formed by water droplets acting as a prism, and the prism shows the color spectrum in ORDER And you can get what's called a double rainbow. read more