Electrophoretic light scattering
![Fig.3. Commercial heterodyne optical system of an electrophoretic light scattering instrument with a modulator (from Ref. 11).](/Images/godic/202501/11/Optics_00025602.jpg")
Electrophoretic light scattering is based on dynamic light scattering. The frequency shift or phase shift of an incident laser beam depends on the dispersed particles mobility. In the case of dynamic light scattering, Brownian motion causes particle motion. In the case of electrophoretic light scattering, oscillating electric field performs the same function.