To the majority of people Einstein's theory is a complete mystery. Their attitude towards Einstein is like that of Mark Twain towards the writer of a work on mathematics: here was a man who had written an entire book of which Mark could not understand a single sentence. Einstein, therefore, is great in the public eye partly because he has made revolutionary discoveries which cannot be translated into the common tongue. We stand in proper awe of a man whose thoughts move on heights far beyond our range, whose achievements can be measured only by the few who are able to follow his reasoning and challenge his conclusions. There is, however, another side to his personality. It is revealed in the addresses, letters, and occasional writings brought together in this book. These fragments form a mosaic portrait of Einstein the man. Each one is, in a sense, complete in itself; it presents his views on some aspect of progress, education, peace, war, liberty, or other problems of universal interest. Their combined effect is to demonstrate that the Einstein we can all understand is no less great than the Einstein we take on trust.

Time's 'Man of the Century', Albert Einstein is the unquestioned founder of modern physics. His theory of relativity is the most important scientific idea of the modern era. In this short book Einstein explains, using the minimum of mathematical terms, the basic ideas and principles of the theory which has shaped the world we live in today. Unsurpassed by any subsequent books on relativity, this remains the most popular and useful exposition of Einstein's immense contribution to human knowledge.

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A new, popular edition with a clear introduction, Special & General Relativity by Albert Einstein contains his core paper, 'Relativity, The Special & The General Theory: A Popular Exposition', which established his reputation as one of the greatest thinkers of our (and perhaps any) age. Also included are two of the Princeton University lectures he gave to explain his findings in more detail, on 'The Meaning of Relativity', as well as the early paper which led to his famous equation E = mc2. The FLAME TREE Foundations series features core publications which together have shaped the cultural landscape of the modern world, with cutting-edge research distilled into pocket guides designed to be both accessible and informative.

Originally published in 1938 by Cambridge University Press, The Evolution of Physics traces the development of ideas in physics, in a manner suitable for any reader. Written by famed physicist Albert Einstein and Leopold Infeld, this latest edition includes a new introduction from modern Einstein biographer, Walter Isaacson. Using this work to push his realist approach to physics in defiance of much of quantum mechanics, Einstein's The Evolution of Physics was published to great popularity and was featured in a Time magazine cover story. A classic work for any student of physics or lover of Albert Einstein, The Evolution of Physics can be enjoyed by any and should be celebrated by all.

General relativity or the general theory of relativity is the geometric theory of gravitation published by Albert Einstein in 1915. It is the current description of gravitation in modern physics. General relativity generalises special relativity and Newton's law of universal gravitation, providing a unified description of gravity as a geometric property of space and time, or spacetime. In particular, the curvature of spacetime is directly related to the four-momentum (mass-energy and linear momentum) of whatever matter and radiation are present. The relation is specified by the Einstein field equations, a system of partial differential equations. Einstein's theory has important astrophysical implications. For example, it implies the existence of black holes-regions of space in which space and time are distorted in such a way that nothing, not even light, can escape-as an end-state for massive stars. There is evidence that such stellar black holes as well as more massive varieties of black hole are responsible for the intense radiation emitted by certain types of astronomical objects such as active galactic nuclei or microquasars.