This book is devoted applications of the Rayleigh-Gans-Debye(RGD) approximation to the calculation light scattering characteristics of nonspherical particles. The general approach to the form-factor of compound particles in the RGD approximation is discussed. Some specific formulas for the amplitude of light scattering of aggregates of nonspherical particles are obtained in the RGD approximation. Formulas obtained earlier for the RGD amplitude of light scattering are presented for cylinder with circular and hexagonal base, for cone and torus, for prism and pyramid with arbitrary polygonal base. Then for layered particles new equations are included. All numerical results and graphs in the book are renovated by author and published for the first time.