What colours go to form a rainbow?

Newton divided the spectrum into seven colours: red, orange, yellow, green, blue, indigo, and violet. But the frequencies of the sunlight are infinite. The human eye has three receptors for the colours red, blue and green. read more

The rainbow is the reflection of all those on the surface of the water droplets. It goes from infrared, red, green, blue and ultraviolet. Some of that energy is reflected, once again on the opposite surface of the droplets and that makes a second rainbow, a weaker one, and with the colours in the inverted order. read more

The order of the colour of a rainbow is the order of a spectrum, that is light broken into seven colours when passing through a prism.The order is Violet,Indigo,Blue,Green,Yellow,Orange and Red.It falls into a formula-VIBGYOR. read more