How electromagnetic radiation such as light is scattered or absorbed by media is used in many fields as it can provide information on the size, shape, number, and dynamics of particles or objects. It is key to fields as diverse as physical chemistry, materials science, nanotechnology, microbiology, astronomy, atmospheric sciences and radar. This is not purely an academic concern, most aerosol mass in the atmosphere, including entrained mineral dust, volcanic ash, and soot consists of particles with irregular shapes and the way they scatter and absorb light has implications for many climate models. One new approach considers the scattering in reciprocal or Q-space. Q-space analysis has been used extensively in the fields of small angle x-ray and neutron scattering but developments in scattering, in general, and light scattering in particular, are relatively recent.   This book provides a thorough overview of how particles of any size or shape scatter and absorb light. Its conceptua