04:49 PM

The curved space: according to Einstein’s General Theory of relativity, light beam will bend under the influence of gravity while passing by a celestial body. Based on “Fermat’s least-time principle” light beam will take the path requiring the least amount of time between two points. The fact that the light beam curves the presence of celestial body, then, logically suggests the shortest distance between two points could be a curved line. The only explanation of a curved line being the shortest path between two points is that the space itself is curved under gravitational pull of the celestial body.