What causes double rainbows?



  1. 0 Votes


    Light traveling through raindrops is reflected once to form a single rainbow and twice to form a double rainbow! The double reflection within the drop causes the light to exit at a greater angle. This affect produces the second rainbow composed of reversed colors!

    See how the primary rainbow is ROYGBIV and the secondary rainbow is VIBGYOR?

  2. 0 Votes

    Here are some GreenAnswers questions dealing with simultaneous rainbows. The first link offers an even more detailed description of the cause than letusgambol has given (which is a good explanation):

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