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Contact: Angela Stark
The Optical Society

Speckle Pattern in Unclotted Whole Blood

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Caption: This video shows the rapid "twinkling" or intensity fluctuations of the speckle pattern in a drop of unclotted whole blood. The rapid "twinkling" is due to the fast thermally-driven motion of blood cells that scatter light.

Credit: Seemantini Nadkarni

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Related news release: Medical researchers use light to quickly and easily measure blood's clotting properties

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