Great site with clear explanation. I thought the double rainbow that one sees emanates from light that enters very low on the raindrop and then reflected twice within the raindrop. Is that true? Your diagram seems to suggest that the primary and secondary rainbows are created by different paths of the same light and not seperate rays of light. Is there any way to add the perspective of the observer to your diagram to show the paths of the light producing what the observor sees (primary and secondary rainbows) and the angles at which the rainbows would be seen in nature. Is there anyway to also add the perspective of the observer to show why the color spectrum is seen as a "bow" or arc and why a rainbow would be seen as a circle from just the right perspective (e.g. airplane). Great site and thanks. Tom DeCoster