... Why are gravity and quantum mechanics incompatible with each other? Why can't they be combined into a single formula or concept? ... RELATED TOPICS: GRAVITY | ... The general theory of relativity is our best concept of gravity. ... Particles then move in the shortest paths along that distorted grid, a process we interpret as the effects of gravity. Thus, relativity, in essence, gives a geometric interpretation of gravity. ... Get instant access to subscriber content on Astronomy.com! ...