Albert Einstein is often viewed as the icon of genius, and his theories are admired for their beauty and correctness. Yet the final judge of any theory is the rigorous test of experiment, not the fame of its inventor or the allure of its mathematics. For decades, general relativity has passed test after test with flying colors, including some remarkable new tests using the recently detected gravitational waves. Still, there are reasons for doubt. Einstein's theory of gravity, as beautiful as it is, seems to be in direct contradiction with another theory he helped create: quantum mechanics. Until recently, this was considered to be a purely academic affair. But as more and more data pour in from the most distant corners of the universe, hinting at bizarre stuff called "dark energy" and "dark matter," some scientists have begun to explore the possibility that Einstein's theory may not provide a complete picture of the cosmos. This book chronicles the latest adventures of scientists as they put Einstein's theory to the test in ever more precise and astonishing ways, and in ever more extreme situations, when gravity is unfathomably intense and rapidly churning. From the explosions of neutron stars and the collisions of black holes to the modern scientific process as a means to seek truth and understanding in the cosmos, this book takes the reader on a journey of learning and discovery that has been 100 years in the making.

This book addresses the latest advances in general relativity research, including the classical world and spinor formalisms; keys to understanding gravity; the continuum mechanics of space-time; new evidences on matter without energy-stress tensor; a new approach to study gravitational stability of the solutions to the Einstein equations; Mond theory; polynumbers field theory; the algebra, geometry and physics of hyperland; S2-like star orbits near the galactic center in RN and Yukawa gravity; geodesic analysis in multidimensional gravity models; and the collapsing of general relativity and the singularity in the event of the Big Bang and black holes.

An inspiring collection of essays, in which Albert Einstein addresses the topics that fascinated him as a scientist, philosopher, and humanitarian Divided by subject matter-"Science," "Convictions and Beliefs," "Public Affairs," etc.-these essays consider everything from the need for a "supranational" governing body to control war in the atomic age, to freedom in research and education, to Jewish history and Zionism, to explanations of the physics and scientific thought that brought him world recognition. Throughout, Einstein's clear, eloquent voice presents an idealist's vision and relays complex theories to the layperson. Einstein's essays share his philosophical beliefs, scientific reasoning, and hopes for a brighter future, and show how one of the greatest minds of all time fully engaged with the changing world around him. This authorized Philosophical Library book features rare photos and never-before-seen documents from the Albert Einstein Archives at the Hebrew University of Jerusalem.

Relativity Revealed: A Concrete Approach You Can Understand presents Einstein's special theory of relativity in clear and simple language. This book is intended for high school students who may have an interest in science, or for adults who simply want to know what relativity is all about. The material in the book was twice presented by the author, Prof. Ray C. Jones, in a series of popular public lectures at Southwestern Oklahoma State University. Special relativity concerns the differences in physical quantities, such as time intervals, lengths and masses, that occur when measured by observers who are in constant speed motion relative to each other or to the objects being measured. Although relativity begins with simple statements about the speed of light and the nature of clocks, we soon find that it changes our perceptions of space and time and leads to an understanding of nuclear fission and fusion processes and the radiation of energy from the sun. This book, by an exceptional teacher, is a very good place to begin to learn of these things. In this book, Prof. Jones develops the major ideas of relativity from simple postulates about observations of the speed of light. The basic ideas are presented in simple language, but are then extended into a consistent logical framework with the aid of some minimal high school level mathematics. (The details of mathematical developments are presented in Appendices that will help to sharpen reader's skills.)

Tired of popular science books written by renowned physicists who think you cannot comprehend what they do, so... all you deserve is the illusion of understanding? If yes, this is the book for you. The fact that the reader may not have a scientific education does not mean that s/he does not have the intelligence to understand profound concepts -- as long as they are presented with semantic and epistemological clarity. After all, Einstein said that Science is simply the refinement of our intuition and everyday experiences. Galloping with Light is a symbolic cavalcade that starts with the discovery of fire 1.5 million years ago; it allegorically employs the imagination of an adolescent called Einstein to explain the Theory of Relativity in non-scientific terms, and ends with the Apollo 11 landing on the Moon in 1969 -- depositing on lunar soil a laser retro-reflector which would prove, once again, that Einstein was right. Motivated by his own difficulties to understand Relativity Theory, and convinced that it is possible to teach the layperson without distorting the subject matter, the author takes an approach utterly opposed to that of most popular science books. Knowing he has to demolish what the reader understands by time, distance, and motion, the author -using his experiences as a child, adolescent, and adult- dedicates the first half of the book to convince the reader that our intuition and common sense, as applied to those three everyday concepts, have a foundation as solid as that of a castle on the sand. The purpose of this book is to demystify and 'defolklorize' the reader; to destroy the aura of mystery and incomprehensibility surrounding Relativity Theory, unmasking and debunking the body of popular (and scientific) beliefs (mostly erroneous) which -taking advantage of the confusion between relativity and subjectivity, as well as of Einstein's popularity and prestige- have been used to validate preposterous assertions in fields like psychology, morality, spirituality, sociology, literature, art, etc.

A nut and its shell, like any X and Y, are joined and separated by a circle. The line is always diameter and circumference of a circle. Thus, pi controls reality, 50-50.

The assertion about the possibility of motion faster than light does not contradict the special relativity. In order to develop the special relativity, is sufficient to assume independence of the speed of light on the reference frame. From equations of special relativity, it follows that object moving faster than light in vacuum cannot be carrier of causal relationship. In the reference frame S3, moving with superluminal speed relative to the reference frame S2, temporal and spatial axes are swapped. Therefore, causal relationships in reference frames S2 and S3 are different. There exists a reference frame S1, moving relative to the reference frame S2 with speed v

The General Principle Of Relativity In Its Philosophical And Historical Aspect (1920)

Relativity: The Special and the General Theory began as a short paper and was eventually published as a book written by Albert Einstein with the aim of giving:
. . . an exact insight into the theory of relativity to those readers who, from a general scientific and philosophical point of view, are interested in the theory, but who are not conversant with the mathematical apparatus of theoretical physics.
- from the Preface
It was first published in German in 1916 and later translated into English in 1920. It is divided into 3 parts, the first dealing with special relativity, the second dealing with general relativity and the third dealing with considerations on the universe as a whole. There have been many versions published since the original in 1916, the latest in December, 2011. The work has been labeled by whom?] unique in that it gives readers an insight into the thought processes of one of the greatest minds of the 20th century.