Amie	时间: 10-07 05:17   主题：无标题
来自：85.8.*.*  QQ：	This is where general relativity comes into play. In general relativity gravity is not seen as a force like in classical physics but rather as a deformation of spacetime. All objects that have mass bend spacetime and the path of objects traveling through spacetime is affected by its curvature. An apple falling from a tree is not going towards the ground because there’s a force "pushing" it down but rather because that’s the shortest path in spacetime （a straight line in bent spacetime）. The larger the mass of objects the larger the curvature of spacetime they produce. Time flows "slower" near large masses and "faster" away from it. Interesting facts: people on a mountain age faster than people on the sea level and it has been calculated that the core of the Earth is 2.5 years younger than the crust. The time dilation caused by gravity on the surface of the Earth may amount to clock drifts in the order of hundreds of nanoseconds per day just like special relativity.
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Lisa	时间: 10-07 05:15   主题：无标题
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