ABSTRACT

Appendix 19A: Cross Sections ........................................................................................................................................... 741 Appendix 19B: Scattering Wave Vector ............................................................................................................................. 742 Acknowledgments.................................................................................................................................................................... 744 References ................................................................................................................................................................................ 744

The goal of this chapter is to give a brief yet comprehensive description of scattering and absorption of light by spherical particles of arbitrary size and aggregates of these particles that have the fractal morphology. This chapter has been updated from its previous appearance in 2003. Changes include a better vision of various patterns in Mie scattering from spheres discovered in 2001. I also include a discussion of multiple scattering and recent work on hybrid aggregate structures. As before I have refrained from derivation but have tried to give a physical interpretation of the results I quote. Exact equations for scattering and absorption are given, but the emphasis is placed not on the equations themselves but instead on the features, i.e., important functional dependencies, relation to other forms, cardinal points, etc., and on their graphical representation. Hence, I hope I have given the reader a user’s guide to light scattering and absorption that will provide a broad yet well-connected perspective.