Jul
16

Why is water clear in a bathtub but look blue in a lake?


The water in a lake absorbs more red to yellow light wavelengths, reflecting blue to our eyes. Depth increases the effect.

Learn why murky water can kill >

Questions come alive at the Smithsonian. SeriouslyAmazing.com

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Posted: 16 July 2013
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About the Author:

Alex di Giovanni is primarily responsible for "other duties as assigned" in the Office of Communications and External Affairs. She has been with the Smithsonian since 2006 and plans to be interred in the Smithson crypt.