## The Search for Non-Newtonian GravityNewton's inverse-square law of gravitation has been one of the cornerstones of physics ever since it was proposed 300 years ago. One of its most well known features is the prediction that all objects fall in a gravitational field with the same acceleration. This observation, in the form of the Equivalence Principle, is a fundamental assumption of Einstein's General Relativity Theory. This book traces the history of attempts to test the predictions of Newtonian Gravity, and describes in detail recent experimental efforts to verify both the inverse-square law and the Equivalence Principle. Interest in these questions have increased in recent years, as it has become recognized that deviations from Newtonian gravity could be a signal for a new fundamental force in nature. This is the first book devoted entirely to this subject, and will be useful to both graduate students and researchers interested in this field. This book describes in detail the ideas that underlie searches for deviations from the predictions of Newtonian gravity, focusing on macroscopic tests, since the question of gravitational effects in quantum systems would warrant a separate work. A historical development is combined with detailed technical discussions of the theoretical ideas and experimental results. A comprehensive bibliography with approximately 450 entries is provided. |

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### Contents

IV | 1 |

V | 11 |

VI | 19 |

VII | 32 |

VIII | 42 |

IX | 44 |

X | 50 |

XI | 51 |

XXVIII | 178 |

XXIX | 180 |

XXX | 184 |

XXXI | 185 |

XXXII | 189 |

XXXIII | 197 |

XXXIV | 203 |

XXXV | 207 |

### Common terms and phrases

acceleration difference ADELBERGER anomalous antimatter apparatus arising baryon baryon number Bizzeti Boynton calculated Chapter charge compared composition configuration constraints contribution coupling CP violation density dependence detected detector determined deviations dipole discussion disk distance scales Earth effects electromagnetic energy Eotvos Eotvos experiment EPF data EPF experiment equivalence principle experimental fifth force FISCHBACH free-fall function geophysical given gravimeters gravitational acceleration gravitational constant gravitational field gravity gradients hence hypercharge interaction inverse-square law isospin kaon laboratory experiments Lett limits measurements neutrinos neutron Newtonian constant Newtonian gravity non-Newtonian force non-Newtonian gravity noted obtained Panov parameters pendant periment Phys possible potential present proof mass radius relative rotation samples scalar Section sensitivity shown in Fig signal Spero sphere spherical Stacey strength test masses theoretical theory thermal Thieberger Thieberger's torque torsion balance torsion balance experiments torsion fiber vector violation weak equivalence principle Yukawa Yukawa potential

### Popular passages

Page 265 - Experimental tests of the gravitational inverse-square law for mass separations from 2 to 105 cm.

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Page 259 - E. Fischbach, D. Sudarsky, A. Szafer, C. Talmadge, and SH Aronson, Proceedings, 2nd Conference on Intersections between Particle and Nuclear Physics, (Lake Louise, Canada, May 26-31, 1986), edited by D. Geesaman, AIP Conference Proceedings #150, p. 1102.

Page 275 - Spin, rotation and C, P and T effects in the gravitational interaction and related experiments.

Page 254 - R. Colella, AW Overhauser, and SA Werner, Observation of Gravitationally Induced Quantum Interference, Phys.