Books with author Dr Albert Einstein

This is a pre-1923 historical reproduction that was curated for quality. Quality assurance was conducted on each of these books in an attempt to remove books with imperfections introduced by the digitization process. Though we have made best efforts - the books may have occasional errors that do not impede the reading experience. We believe this work is culturally important and have elected to bring the book back into print as part of our continuing commitment to the preservation of printed works worldwide.

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.

The most advanced and celebrated mind of the 20th Century, without a doubt, is attributed to Albert Einstein. This interesting book allows us to explore his beliefs, philosophical ideas, and opinions on many subjects. Subjects include politics, religion, education, the meaning of life, Jewish issues, the world economy, peace and pacifism. Einstein believed in the possibility of a peaceful world and in the high mission of science to serve human well-being. As we near the end of a century in which science has come to seem more and more remote from human values, Einstein's perspective is indispensable.

Relativity - The Special and General Theory/ Sidelights on Relativity is a compilation of two classic Albert Einstein physics papers. Special relativity is a theory of the structure of spacetime. It was introduced in Einstein's 1905 paper "On the Electrodynamics of Moving Bodies" (for the contributions of many other physicists see History of special relativity). Special relativity is based on two postulates which are contradictory in classical mechanics: The laws of physics are the same for all observers in uniform motion relative to one another (principle of relativity). The speed of light in a vacuum is the same for all observers, regardless of their relative motion or of the motion of the light source. The resultant theory copes with experiment better than classical mechanics. For instance, postulate 2 explains the results of the Michelson–Morley experiment. Moreover, the theory has many surprising and counterintuitive consequences. Some of these are: Relativity of simultaneity: Two events, simultaneous for one observer, may not be simultaneous for another observer if the observers are in relative motion. Time dilation: Moving clocks are measured to tick more slowly than an observer's "stationary" clock. Length contraction: Objects are measured to be shortened in the direction that they are moving with respect to the observer. Maximum speed is finite: No physical object, message or field line can travel faster than the speed of light in a vacuum. The effect of Gravity can only travel through space at the speed of light, not faster or instantaneously. Mass–energy equivalence: E = mc2, energy and mass are equivalent and transmutable. Relativistic mass, idea used by some researchers. The defining feature of special relativity is the replacement of the Galilean transformations of classical mechanics by the Lorentz transformations. General relativity is a theory of gravitation developed by Einstein in the years 1907–1915. The development of general relativity began with the equivalence principle, under which the states of accelerated motion and being at rest in a gravitational field (for example, when standing on the surface of the Earth) are physically identical. The upshot of this is that free fall is inertial motion: an object in free fall is falling because that is how objects move when there is no force being exerted on them, instead of this being due to the force of gravity as is the case in classical mechanics. This is incompatible with classical mechanics and special relativity because in those theories inertially moving objects cannot accelerate with respect to each other, but objects in free fall do so. To resolve this difficulty Einstein first proposed that spacetime is curved. In 1915, he devised the Einstein field equations which relate the curvature of spacetime with the mass, energy, and any momentum within it. Some of the consequences of general relativity are: Clocks run slower in deeper gravitational wells. This is called gravitational time dilation. Orbits precess in a way unexpected in Newton's theory of gravity. (This has been observed in the orbit of Mercury and in binary pulsars). Rays of light bend in the presence of a gravitational field. Rotating masses "drag along" the spacetime around them; a phenomenon termed "frame-dragging". The universe is expanding, and the far parts of it are moving away from us faster than the speed of light. Technically, general relativity is a theory of gravitation whose defining feature is its use of the Einstein field equations. The solutions of the field equations are metric tensors which define the topology of the spacetime and how objects move inertially.

The image is popular and general: A young man sits under an apple tree. An apple falls, strikes him and sets him on a course to receive those epiphanies, eureka moments, in which he deduces how the physical world works. The young man was Isaac Newton and the consequent laws are known as Newtonian physics. Move ahead two hundred years and the second image, though less well known, is of another young man with unruly hair, sitting on a hillside in Germany not far from the patent office where he worked. There Albert Einstein received his own epiphany, followed by several eureka moments, from which he deduced those laws of physics, now termed the Theory of Relativity, a theory that superseded Newton’s 200 year old theories of mechanics, and, in no small part, ushered in the Modern Era. The Theory of Relativity, is actually comprised of two theories: special relativity and general relativity. The concepts introduced in these two theories are three-fold: (1) The measurement of certain quantities is dependent upon the speed of the observer; (2) Space and time (“spacetime”) should be considered in relation to one another; and (3) The speed of light is, nonetheless, an absolute constant, invariant and the same for all observers. In any construct that allows for the relative nature of relationships, the observer must seek out the sole constant on which all relationships depend for their accurate expression. Einstein found it in the speed of light, and from that constant looked anew at the behavior of the smallest elements of matter (Special Relativity, 1905), as well as the projected behavior of an infinite cosmos (General Relativity, 1916). (Summary by Michael Hogan)

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One of the world’s greatest minds addresses religion and science, war and peace, and the treatment of minorities in this authorized collection. In the aftermath of the First World War, Albert Einstein writes about his hopes for the League of Nations, his feelings as a German citizen about the growing anti-Semitism and nationalism of his country, and his myriad opinions about the current affairs of his day. In addition to these political perspectives, The World As I See It reveals the idealistic, spiritual, and witty side of this great intellectual as he approaches topics including “Good and Evil,” “Religion and Science,” “Active Pacifism,” “Christianity and Judaism,” and “Minorities.” Including letters, speeches, articles, and essays written before 1935, this collection offers a complete portrait of Einstein as a humanitarian and as a human being trying to make sense of the changing world around him. This authorized ebook features a new introduction by Neil Berger, PhD, and an illustrated biography of Albert Einstein, which includes rare photos and never-before-seen documents from the Albert Einstein Archives at the Hebrew University of Jerusalem.