The Physics of Rainbows and Double Rainbows (OMG!!)

Professor Mike Merrifield explains why there's always a double rainbow, and even a triple rainbow that we can't see.
Zawashsays...

Quality and science - all the way. Good sift!

By the way - the light is polarized, so try wearing polarized sunglasses the next time you watch a rainbow (or use a polarized filter for your camera), and by rotating the polarized glass you can make the rainbow disappear - or appear twice as bright, compared the background..

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