Iridescences : The Physical Colors of Insects Butterflies and coleopterans are beautifully colored insects. This book aims to understand the origin of these brilliant colors from a physics perspective. It explains the different physical phenomena and shows numerous color illustrations. It is suitable for optical physicists biologists and teachers alike Lepidoptera and Coleoptera butterflies and beetles are the most beautifully colored insects we can find. This book explores the origin of these brilliant colors from a physics perspective beginning with the simplest question: Why Colors The author masterfully explains at an introductory level the coloring of insects and illustrates his points with more than 240 brilliant figures. The book is a rich source for optical physicists biologists and teachers alike.