Tuesday, June 16, 2009

Using geometry to find a rainbow

Chad Orzel at Uncertain Principles has a neat little post up about rainbows.

And you thought geometry could never come in handy.

I think it's pretty neat that the angle made by two hands is nearly scale-invariant. I wonder what that angle is for chimpanzees or other apes whose arms are longer relative to their bodies than human arms are?

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