Abstract
Light is electromagnetic radiation that can be detected by the human eye. The visual appearance of food depends on optical phenomena such as absorption, reflection, scattering, gloss, and color. In this chapter, physical causes of refraction, diffraction, absorption, and transmission are explained in a concise and comprehensive way, and how these phenomena stem from the interaction between electromagnetic radiation and matter. They are illustrated by numerous examples. Causes for optical activity in food ingredients are explained and techniques such as polarimetry and ellipsometry are presented. Color is represented as a vector in different color systems and compared with visual sensation. At the end of the chapter, examples of applications are listed that can be used for further studies.
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Figura, L.O., Teixeira, A.A. (2023). Optical Properties. In: Food Physics. Springer, Cham. https://doi.org/10.1007/978-3-031-27398-8_12
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