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Diffusing-wave spectroscopy
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<p>Diffusing-wave spectroscopy (DWS) is an optical technique derived from <a href="/facts/Dynamic_light_scattering/dAJRM90w">dynamic light scattering</a> (DLS) that studies the dynamics of scattered light in the limit of strong multiple scattering. It has been widely used in the past to study colloidal <a href="/facts/Suspension_(chemistry)/S3xp96TL">suspensions</a>, <a href="/facts/Emulsions/YMSqSCuH">emulsions</a>, <a href="/facts/Foams/kGrXWWcb">foams</a>, gels, biological media and other forms of <a href="/facts/Soft_matter/62NTslbq">soft matter</a>. If carefully calibrated, DWS allows the quantitative measurement of microscopic motion in a soft material, from which the <a href="/facts/Rheological/KexaBNCS">rheological</a> properties of the complex medium can be extracted via the <a href="/facts/Microrheology/nSPhRoyN">microrheology</a> approach. </p>