Eli5 : is the order of the colors in a real rainbow always the same? and why , whichever it is?

Question

Eli5 : is the order of the colors in a real rainbow always the same? and why , whichever it is?

In: 4

Answer 1

The brightest rainbow always has the same colour order, with red on the outside, but in ideal conditions a secondary rainbow can become visible outside the primary. The colour order of the secondary rainbow has the red on the inside, the opposite to that of the primary.

The reason for the difference is that the secondary rainbow involves the light being bent through more than 180°, i.e., it’s bent back on itself.