Earth Science photo of the Day...!!! 14/11/11

Rainbow and Eiffel Tower
Photographer: Bertrand Kulik
Summary Author: Bertrand Kulik; Jim Foster

This eye-catching rainbow arching over the Eiffel Tower was snapped from my home in Paris, France on the afternoon of October 25, 2011. The width of a rainbow is approximately two degrees; for comparison, the Sun’s diameter is about 0.5 degrees across. Note that each of the primary bow’s color bands is about 0.5 degrees in width. Rainbow colors seem impure (colors overlap) because while rays of sunlight entering a prism emerge parallel to each other, the way they entered, rays emerging from a raindrop diverge.

 

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