# equivalence principle

(redirected from*Weak equivalence principle*)

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## 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.

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