equivalence principle

(redirected from Universality of free fall)
Also found in: Dictionary.
Related to Universality of free fall: Weak equivalence principle

equivalence principle

(i-kwiv -ă-lĕns) The principle that, on a local scale, the physical effects of a uniform acceleration of some frame of reference imitates completely the behavior in a uniform gravitational field. This equivalence of the two frames of reference was introduced by Albert Einstein in his general theory of relativity. It is a generalization of the observed direct proportionality between gravitational and inertial mass.

equivalence principle

[i′kwiv·ə·ləns ‚prin·sə·pəl]
(relativity)
In general relativity, the principle that the observable local effects of a gravitational field are indistinguishable from those arising from acceleration of the frame of reference. Also known as Einstein's equivalency principle; principle of equivalence.
References in periodicals archive ?
These kind of experiments, however, could only test the universality of free fall towards ordinary matter, like the Earth itself whose composition is dominated by iron (32 percent), oxygen (30 percent), silicon (15 percent) and magnesium (14 percent).
That would imply a violation of the universality of free fall towards dark matter.
To test the universality of free fall towards dark matter, the research team identified a particularly suitable binary pulsar, named PSR J1713+0747, which is at a distance of about 3800 light years from the Earth.