For 10 points, name this fundamental force described by general relativity.
A classic textbook titled for this phenomenon is abbreviated MTW for its three authors. In one theory of this phenomenon, integrating the square of Hamiltonian constraints over induced metrics creates a master constraint. Milgrom proposed a theory in which this phenomenon has a force proportional to the square  of acceleration. Feynman  (FINE-min)  hypothesized using beads on a rod to measure the radiation caused by this phenomenon, which today is measured using (*)  interferometers with four-mile arms. LQG and MOND  ("mond")  are theories of this phenomenon. According to the equivalence principle, this phenomenon is indistinguishable from being in a noninertial reference frame. Another theory equates it with spacetime curvature. For 10 points, name this fundamental force described by general relativity.
A classic textbook titled for this phenomenon is abbreviated MTW for its three authors.
gravity  [or  gravitation ; or  gravitational force ; or  gravitational  radiation; or  gravity  waves; or gravitational wave s] 