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Gravity: an introduction to Einstein's General Relativity James B. Hartle
Publisher: Benjamin Cummings

It also turns out that no experiment can tell the difference between floating motionless in deep space and accelerating under the pull of gravity (when you fall you're weightless). Feb 9, 2012 - Einstein's general relativity basically tells us that massive objects bend the space-time they are sat in and that this is the origin of gravity. Mar 13, 2014 - General relativity (GR) is the theory that replaces Newton's version of gravitation, but at the end of the day it's still gravity, and it has the same strength that it always did. May 9, 2014 - Reference: Moore, Thomas A., A General Relativity Workbook, University Science Books (2013) - Chapter 20; Box 20.1. Oct 20, 2008 - Although the concept of relativity was not introduced by Einstein, his major contribution was the recognition that the speed of light in a vacuum is constant and an absolute physical boundary for motion. Sep 29, 2010 - Einstein showed that the presence of gravity affects geometry by warping space and time. Sep 29, 2010 - Einstein Science currently requires all the basic laws of science to be time symmetric, to not distinguish between change toward the future and change toward the past. Sep 20, 2009 - But I came across this reference which seem to strongly suggest that while Einstein was busy playing violin and discussing philosophy in the Prague Circle - and working on his General Theory of Relativity - he indeed may have come under signficant conceptual Einstein's idea was to actually include electromagnetic fields in his gravitational field equations by introducing them (by means of their potentials) into the metric components of space-time, in first place. Mar 27, 2014 - The term "Brans-Dicke," apparently first introduced by Dicke in his 1962 paper on transformation of units (Dicke 1962), is widely used to describe a modification of Einstein's original formulation of General Relativity to bring it into This scalar, \(\phi\), like gravity, has all matter as its source, and thus, in some semantic sense could be described as an extension of the gravitational field from purely geometric to geometric plus scalar, thus the term "scalar-tensor . This does not have a The second is the General Theory of Relativity, which primarily applies to particles as they accelerate, particularly due to gravitation, and acts as a radical revision of Newton's theory, predicting important new results for fast-moving and/or very massive bodies. If they do that in a way that's not subject to the basic description of light, then we need a better field theory that includes electric and magnetic fields within the same bending of space-time as general relativity. May 11, 2014 - There's special relativity. Mar 21, 2013 - Einstein Gravity in a Nutshell A. In an elevator in empty space) was indistinguishable from the effect of gravity on the surface of a planet. I suspect teachers might be wary of introducing Einstein as a role model in schools, given the risk of having to explain what the theory of relativity is all about! Einstein's stunning insight (paraphrased) was “dudes! [The second law of thermodynamics is not a basic law.] Also, the basic laws cannot change Also, special relativity considers space-time to be a passive arena for events, but general relativity requires spacetime to be dynamic in the sense that changes in matter-energy can change the curvature of space-time itself. Mar 12, 2014 - Instead, he won for his 1905 proposal of the law of the photoelectric effect—empirically verified in the following decade by Robert Millikan—and for general “services to theoretical physics.” It was a political decision Einstein realized that the question of the relativity of motion was tied up with the theory of Gravity: that uniform acceleration (e.g. Mar 14, 2014 - The man is responsible for the general and special theories of relativity, a cornerstone of physics and a way of understanding our universe that has proven so consistently reliable that it is probably the closest humanity will ever get to a decisive cosmic capital-T Truth.