De golflengtes breken twee keer, één keer aan beide kanten... en de regenboog ontstaat uit de overgang van rood naar blauw. ###>The Sun, for the light source... but instead of a raindrop, you now have a prism. Different wavelengths are refracted at different angles. They're refracted twice, once out of each side... and then you have a rainbow that is produced... from the separation of red all the way through blue.