General Relativity and the Equivalence Principle

In the theory of general relativity, the equivalence principle is any of several related concepts dealing with the equivalence of gravitational and inertial mass, and to Albert Einstein's observation that the gravitational "force" as experienced locally while standing on a massive body (such as the Earth) is the same as the pseudo-force experienced by an observer in a non-inertial (accelerated) frame of reference.

General relativity (GR, also known as the general theory of relativity or GTR) is the geometric theory of gravitation published by Albert Einstein in 1915[2] and the current description of gravitation in modern physics.

equivalence principle: Fundamental law of physics that states that gravitational and inertial forces are of a similar nature and often indistinguishable. In the Newtonian form it asserts, in effect,...

011 - Equivalence Principle In this video Paul Andersen explains how inertial mass and gravitational mass are equivalent. He shows you too simple methods for...

Experiments performed in a uniformly accelerating reference frame with acceleration a are indistinguishable from the same experiments performed in a non-accelerating reference frame which is situated in a gravitational field where the acceleration of gravity = g = -a = intensity of gravity field.

Principle of Equivalence is again one of the most profound proofs of the Einstein's theory that a massive object bends spacetime. Let's go for a ride in the ...

Einstein’s equivalence principle is just the Galileo/Newton equivalence principle with slightly different fine print about scope and limitations. The Galileo...

I have skimmed through this book Handbook of Spacetime: The following represents my impressions formulated after reading the sections about the equivalence principle. I read this paper: However, Einstein did not write this wonderful passage in the letter to Robert Lawson. Here is the letter to Lawson (Einstein to Lawson, 22 January 1920): Einstein writes to Lawson…

A summary of General Relativity in 's Albert Einstein. Learn exactly what happened in this chapter, scene, or section of Albert Einstein and what it means. Perfect for acing essays, tests, and quizzes, as well as for writing lesson plans.

So far, the equivalence principle says that gravity behaves the same way for the largest galaxy clusters down to the microscopic particles. The only place to go from here is up.

The result of Einstein’s experimental elevator experiment was nothing less than the principles underlying the General Theory of Relativity.

Physicists have performed a test designed to investigate the effects of the expansion of the universe—hoping to answer questions such as "does the expansion of the universe affect laboratory experiments?",

It was 1905, and Albert Einstein had just turned theoretical physics on its head by publishing a paper on what later became known as special relativity. This showed that space and time could not be considered in absolute terms: time could speed up or slow down; standard lengths could contract; and masses could increase.