This textbook is designed for students who have completed one year of physics and want to learn more about the principles of light. It covers topics such as geometrical optics, wave theory, and polarization. The book includes numerous examples and exercises to help students deepen their understanding of the subject.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.