Treatise on light (Illustrated and Translated)

Treatise on Light: In Which Are Explained the Causes of That Which Occurs in Reflection & Refraction is a book by Christiaan Huygens, published in 1690. The book describes Huygens's theory of light propagation, which he believed to be a series of shock waves that travel through the ether. The book is considered a pioneering work of theoretical and mathematical physics. This book has an active table of contents:PREFACE 3NOTE BY THE TRANSLATOR.4TREATISE ON LIGHT6CHAPTER I 6ON RAYS PROPAGATED IN STRAIGHT LINES. 6CHAPTER II. 19ON REFLEXION19CHAPTER III 23ON REFRACTION23CHAPTER IV33ON THE REFRACTION OF THE AIR33CHAPTER V... 38ON THE STRANGE REFRACTION OF ICELAND CRYSTAL38CHAPTER VI. 72ON THE FIGURES OF THE TRANSPARENT BODIES. 72Which serve for Refraction and for Reflexion. 72END 88INDEX 88