" For 10 points, name this force described by an inverse-square law with the product of each object's mass in the numerator, a law developed by Newton.
The reciprocal of the black hole entropy, called the Immirzi parameter, appears in a "loop" theory of this force. Objects influenced by this force travel along geodesics. The Laplace-Runge-Lenz vector is a constant of motion resulting from this force, whose strength is the subject of the heirarchy problem. The Kepler problem in the study of this force has only one exact modern solution, named for (*) Schwarzschild. This force can cause the appearance of additional images due to intervening galaxy clusters in a phenomenon known as "lensing." For 10 points, name this force described by an inverse-square law with the product of each object's mass in the numerator, a law developed by Newton.
The reciprocal of the black hole entropy, called the Immirzi parameter, appears in a "loop" theory of this force.
{gravity} [accept {loop quantum gravity} before “{loop}” is read]