Introduction

This chapter serves as the introduction, where we provide a concise overview of the theoretical underpinnings of Rayleigh scattering. We highlight the pivotal role played by quantum mechanics in advancing our understanding of this phenomenon and acknowledge the persisting challenges within the theory. Furthermore, we draw attention to the notion of virtual states, frequently invoked to elucidate scattering effects despite their absence in experimental observations. In this book, we depart from this concept, presenting an alternative approach to comprehending light-scattering phenomena. Additionally, we offer a glimpse into the broader context of the subsequent chapters, providing readers with a roadmap for the exploration of this subject matter.