In the physics 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 actually the same as the *pseudo-force* experienced by an observer in a non-inertial (accelerated) frame of reference.

Read more about Equivalence Principle: Einstein's Statement of The Equivalence Principle, Development of Gravitation Theory, Modern Usage, Challenges To The Equivalence Principle, Explanations of The Equivalence Principle, Experiments

### Other articles related to "equivalence, equivalence principle, principle":

... different locations around the Earth, all of which demonstrated the same

**equivalence**in mass (1922, torsion balance, 5×10−9 relative sensitivity) ... validate contemporary understanding of the

**equivalence principle**encoded in general relativity (e.g, Einstein's elevator), which states that gravitational and inertial. 2012 Eötvös experiment sensitivity to

**Equivalence Principle**violation was 5×10−14 difference/average ...

**Equivalence Principle**(EEP)

... The first is the uniqueness of free fall, also known as the Weak

**Equivalence Principle**(WEP) ... Metric theories satisfy the Einstein

**Equivalence Principle**... Gauge theory gravity is a notable exception, where the strong

**equivalence principle**is essentially the minimal coupling of the gauge covariant derivative ...

... energy in the vicinity of matter, which would violate the energy

**principle**... In addition, all of those models violated the

**equivalence principle**, and Einstein argued that it is impossible to formulate a theory which is both Lorentz-covariant and satisfies the

**equivalence principle**... relativity), which fulfills both the

**equivalence principle**and general covariance ...

**Equivalence Principle**- Experiments

... experiment Satellite Test of the

**Equivalence Principle**(STEP) MICROSCOPE Satellite Energy Exchange (SEE) "...Physicists in Germany have used an atomic interferometer to perform the most accurate ...

### Famous quotes containing the word principle:

“Thanks to all. For the great republic—for the *principle* it lives by, and keeps alive—for man’s vast future,—thanks to all.”

—Abraham Lincoln (1809–1865)