Chapter 2. Light, Optics, and Appearance

In this chapter, we provide the physical background for the discussion of the processes of light interaction with human skin. We start with a brief discussion of the nature of light and a concise review of fundamental optics concepts. This presentation is then followed by an overview of the main light and matter interaction processes and the physical terms usually employed in their quantification.

The interactions of light with human tissue are the object of extensive investigations in a myriad of fields, from biomedical optics to remote sensing. To maximize the cross-fertilization with these fields, it is necessary to use a consistent terminology. For this purpose, in this chapter, we also define relevant ...

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