GRAVI

GRAVI was an experiment, to determine the gravitational force at very small

accelerations at values comparable to what is observed at large astronomical

distances; at settings where observations generally indicate rather large deviations

from Newtonian expectations.

The experiment is based on changing the position of a pendulum under the

influence of the gravitational force of masses that are placed on various distances with

respect to the pendulum mass. The determination of the changes of the pendulum position is based on

the highly precise measurement of the resonance frequency of a GHz cavity.

A first result on the performance of such a setup has been

published in "General Relativity and Gravitation". ( H Meyer )

Our recent publication is available under

arXiv: 2407.21482v2