Double rainbow colors reversed?

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Offline Gregorian

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Double rainbow colors reversed?
« on: 02/06/2009 01:20:01 »
Hi
Why is it that when you see a double rainbow the colors of the higher one are reversed?
« Last Edit: 02/06/2009 01:25:45 by Gregorian »
The more I study science the more I believe in God - Albert Einstein


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lyner

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Double rainbow colors reversed?
« Reply #2 on: 02/06/2009 22:33:13 »
There are many links about this -here's one http://www.phy.cuhk.edu.hk/phyworld/iq/rainbow/rainbow_e.html

The reason for the colour reversal in a secondary rainbow is that the light is internally reflected one extra time inside the raindrops. This means that the blue light is bent more than the red - unlike in the primary bow when the red is bent more than the blue. Look at the pics in the link if my garbled explanation is inadequate.