Static Light Scattering (SLS) is a technique used to measure the intensity of light scattered by a sample to determine its molecular weight, size, and shape. In the context of nanotechnology, SLS is particularly valuable for characterizing nanoparticles and nanomaterials. When a laser beam passes through a sample, the light is scattered by the particles, and by analyzing the scattered light at different angles, one can draw conclusions about the properties of the particles.