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Factoid/2008/08/18

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< Beachapedia:Factoid‎ | 2008‎ | 08


Water Quality Testing By Researchers Using Lasers and Sound Waves

"By shining a laser beam on the tiny pieces of algae floating in the water, the researchers said they hear sound waves that tell them the type and amount of contamination in the water." - excerpt from this Reuters article.

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