Abstract The physical principles of Raman scattering are briefly outlined. The different effects on the intensity, shape and frequency of Raman bands, especially for liquids and liquid mixtures, are discussed. The peculiarities of Raman scattering on micrometer sized particles are presented. Methods to calculate Raman scattering on micro particles are referred to briefly. The effect of morphology dependant resonances on Raman scattering on levitated particles is discussed. Finally, the different experimental concepts, Raman scattering on levitated particles (optically or electro-dynamically trapped) on particle chains and flowing aerosols are described.