Our Ignorance About Gravity

Our Ignorance About Gravity with tags physics, minutephysics, science

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.REFERENCESReview of short-range gravity experiments in the LHC erahttps://arxiv.org/abs/1408.3588v2Zeptonewton force sensing with nanospheres in an optical latticehttps://arxiv.org/abs/1603.02122Large extra dimensionshttps://en.wikipedia.org/wiki/Large_extra_dimensionSearch for Screened Interactions Associated with Dark Energy Below the 100 m Length Scalehttps://arxiv.org/abs/1604.04908Tests of the Gravitational Inverse-Square Law below the Dark-Energy Length Scalehttps://arxiv.org/abs/hep-ph/0611184v1Photon Mass Experimenthttp://dx.doi.org/10.1119/1.13149Torsion balance experiments: A low-energy frontier of particle physicsE.G. Adelberger, J.H. Gundlach, B.R. Heckel, S. Hoedl, S. Schlammingerdoi:10.1016/j.ppnp.2008.08.002TESTS OF THE GRAVITATIONAL INVERSE-SQUARE LAWE.G. Adelberger, B.R. Heckel, and A.E. NelsonAnnu. Rev. Nucl. Part. Sci. 2003. 53:77121 doi: 10.1146/annurev.nucl.53.041002.110503Physical 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.Support MinutePhysics on Patreon! http://www.patreon.com/minutephysicsLink to Patreon Supporters: http://www.minutephysics.com/supporters/MinutePhysics is on twitter - @minutephysicsAnd facebook - http://facebook.com/minutephysicsAnd Google+ (does anyone use this any more?) - http://bit.ly/qzEwc6Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!Created by Henry Reich