Describes how the eye interprets light and sends images to the brain, and explains why some people need corrective lenses to correct and complement poor eyesight.

How would you go about rebuilding a technological society from scratch? If our technological society collapsed tomorrow what would be the one book you would want to press into the hands of the postapocalyptic survivors? What crucial knowledge would they need to survive in the immediate aftermath and to rebuild civilization as quickly as possible? Human knowledge is collective, distributed across the population. It has built on itself for centuries, becoming vast and increasingly specialized. Most of us are ignorant about the fundamental principles of the civilization that supports us, happily utilizing the latest—or even the most basic—technology without having the slightest idea of why it works or how it came to be. If you had to go back to absolute basics, like some sort of postcataclysmic Robinson Crusoe, would you know how to re-create an internal combustion engine, put together a microscope, get metals out of rock, or even how to produce food for yourself? Lewis Dartnell proposes that the key to preserving civilization in an apocalyptic scenario is to provide a quickstart guide, adapted to cataclysmic circumstances. The Knowledge describes many of the modern technologies we employ, but first it explains the fundamentals upon which they are built. Every piece of technology rests on an enormous support network of other technologies, all interlinked and mutually dependent. You can’t hope to build a radio, for example, without understanding how to acquire the raw materials it requires, as well as generate the electricity needed to run it. But Dartnell doesn’t just provide specific information for starting over; he also reveals the greatest invention of them all—the phenomenal knowledge-generating machine that is the scientific method itself. The Knowledge is a brilliantly original guide to the fundamentals of science and how it built our modern world.

Glass: Science and Technology, Volume 5: Elasticity and Strength in Glasses covers the scientific and engineering aspects of glass elasticity and strength. This volume is organized into six chapters and begins with the examination of the elastic properties of vitreous silica and silicate glasses, including those that contain moderate amounts of other network formers. The following chapters describe the fracture mechanics and inelastic deformation of oxide, metallic, and polymeric glasses. The discussion then shifts to the concept of glass strengthening approaches and some technologies of significant practical application to glasses. A chapter explores the process of thermal tempering of glass, including the physics, theories, and standards of the process. The last chapter focuses on the practical aspects of chemical strengthening and the mechanical and physical properties of the obtained glass. This book is of great benefit to glass scientists and researchers.

This book provides a concise and inexpensive introduction for an undergraduate course in glass science and technology. The level of the book has deliberately been maintained at the introductory level to avoid confusion of the student by inclusion of more advanced material, and is unique in that its text is limited to the amount suitable for a one term course for students in materials science, ceramics or inorganic chemistry. The contents cover the fundamental topics of importance in glass science and technology, including glass formation, crystallization, phase separation and structure of glasses. Additional chapters discuss the most important properties of glasses, including discussion of physical, optical, electrical, chemical and mechanical properties. A final chapter provides an introduction to a number of methods used to form technical glasses, including glass sheet, bottles, insulation fibre, optical fibres and other common commercial products. In addition, the book contains discussion of the effects of phase separation and crystallization on the properties of glasses, which is neglected in other texts. Although intended primarily as a textbook, Introduction to Glass Science and Technology will also be invaluable to the engineer or scientist who desires more knowledge regarding the formation, properties and production of glass.

Fundamentals of Inorganic Glasses, Third Edition, is a comprehensive reference on the field of glass science and engineering that covers numerous, significant advances. This new edition includes the most recent advances in glass physics and chemistry, also discussing groundbreaking applications of glassy materials. It is suitable for upper level glass science courses and professional glass scientists and engineers at industrial and government labs. Fundamental concepts, chapter-ending problem sets, an emphasis on key ideas, and timely notes on suggested readings are all included. The book provides the breadth required of a comprehensive reference, offering coverage of the composition, structure and properties of inorganic glasses. - Clearly develops fundamental concepts and the basics of glass science and glass chemistry - Provides a comprehensive discussion of the composition, structure and properties of inorganic glasses - Features a discussion of the emerging applications of glass, including applications in energy, environment, pharmaceuticals, and more - Concludes chapters with problem sets and suggested readings to facilitate self-study

23-year-old Samantha Page cannot read, and she's running out of money. She's never held down a job, and is losing hope of ever improving her life. Everything changes when she finds a pair of glasses that turn her into a supercomputer. Spellbound upon discovering a world of books and words, Sam’s thirst for knowledge is relentless. Her newfound abilities lead her to university, followed by previously unreachable opportunities and incredible wealth. Sam isn’t the only one who knows about the glasses; there are others who seek the power they provide. But is she willing to hold on to them, even if it means losing everything she loves?