Turbidity refers to the cloudiness or haziness of a fluid caused by large numbers of individual particles that are generally invisible to the naked eye. These particles can include sediment, algae, plankton, and various organic and inorganic materials. Turbidity is commonly measured in water quality assessments and can be an important indicator of water health. In environmental contexts, high turbidity can impact aquatic ecosystems by reducing light penetration, which affects photosynthesis in submerged plants.
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Cloudiness measured through attenuation or scattering of light. actin filaments, bundles and aggregates can contribute differently, so the signal is not automatically proportional to polymer mass.