vihart pythagoras Our Ignorance About Gravity

Thanks to the Heising Simons Foundation ( https://www.hsfoundation.org/) for their support of this video, and of short range gravity research.

This video is about how little we know about the behavior of gravity at short length and distance scales, what the constraints are on the inverse square law/Newton's law of universal gravitation, at the human and microscopic and atomic scales. Only on solar system scales or larger do we have good constraints on Newton's law of gravitation.

REFERENCES

Review of short-range gravity experiments in the LHC era
https://arxiv.org/abs/1408.3588v2

Zeptonewton force sensing with nanospheres in an optical lattice
https://arxiv.org/abs/1603.02122

Large extra dimensions
https://en.wikipedia.org/wiki/Large_e...

Search for Screened Interactions Associated with Dark Energy Below the 100 μm Length Scale
https://arxiv.org/abs/1604.04908

Tests of the Gravitational Inverse-Square Law below the Dark-Energy Length Scale
https://arxiv.org/abs/hep-ph/0611184v1

Photon Mass Experiment
http://dx.doi.org/10.1119/1.13149

Torsion balance experiments: A low-energy frontier of particle physics
E.G. Adelberger, J.H. Gundlach, B.R. Heckel, S. Hoedl, S. Schlamminger
doi:10.1016/j.ppnp.2008.08.002

TESTS OF THE GRAVITATIONAL INVERSE-SQUARE LAW
E.G. Adelberger, B.R. Heckel, and A.E. Nelson
Annu. Rev. Nucl. Part. Sci. 2003. 53:77–121 doi: 10.1146/annurev.nucl.53.041002.110503

Physical Review A, Vol 33, No 1: Improved result for the accuracy of Coulomb's law: A review of the Williams, Faller, and Hill experiment.
Lewis P. Fulcher.

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vihart pythagoras Our Ignorance About Gravity
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