Kinetic Energy and the Equivalence Principle

Details Kinetic Energy and the Equivalence Principle Kinetic Energy and the Equivalence Principle

1999-09-03

arxiv.org/abs/gr-qc/9909014v1

Am.J.Phys.66:409-413,1998

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, LaTeX; pedagogical paper sent to archive at students' request

Scientific paper

10.1119/1.18885

According to the general theory of relativity, kinetic energy contributes to gravitational mass. Surprisingly, the observational evidence for this prediction does not seem to be discussed in the literature. I reanalyze existing experimental data to test the equivalence principle for the kinetic energy of atomic electrons, and show that fairly strong limits on possible violations can be obtained. I discuss the relationship of this result to the occasional claim that ``light falls with twice the acceleration of ordinary matter.''

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