General relativity (GR) is a theory of gravity developed by Albert Einstein from 1907 to 19 15. According to the general theory of relativity, the observed attraction between masses comes from "the distortion of space and time by these masses". General relativity has developed into an important tool of modern astrophysics. It provides a basis for people's understanding of black holes at present: in these spatial areas, gravity is so strong that even light cannot escape.
Tic Tac demonstrates the effects of Special Relativity (SR), including the use of angular momentum for length expansion during propulsion.
Einstein's On Electrodynamics of Moving Objects 1905 was received on June 30th, and published on September 26th of the same year. It unifies Maxwell's electric and magnetic equations with the laws of mechanics, and makes great changes in mechanics close to the speed of light. This was later called Einstein's special theory of relativity.
The results include: when measured in the observer's frame, the spatio-temporal frame of the moving object seems to be decelerating and contracting (moving direction). This paper also thinks that the idea of optical ether, one of the main theoretical entities of physics at that time, is redundant.
Hal Patov discussed the problem of time travel. We assume that the speed of light is our fixed time reference and the time of gravity is our variable. With the expansion of time and space (g00 > 1, | g11| < 1) time contraction length expands, so the anti-gravity pre-signal; We observed this effect in the nanopits of 10μm× 10μm, as shown in the following figure. For an unexpanded space-time observer, the speed of an object moving in air seems to exceed the speed of light when it expands.