Dynamic light scattering (DLS) is a technique used to measure the size distribution of small particles, typically in the nanometer to micrometer range, in suspension or in a colloidal system. The fundamental principle behind DLS is the analysis of the fluctuations in the intensity of scattered light due to the Brownian motion of the particles. ### Key Concepts: 1. **Brownian Motion**: Particles in a liquid or gas are constantly in motion due to thermal energy.
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