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發表於 2011-12-9 17:20:12
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Hi
In general relativity gravity is the curvature of the space-time. There is no
gravitational force, like in the Newtonian mechanics, but the space-time is
curved, and the particles (like planets, for example) move on their paths not
because there is a force acting on them, but because they follow the curvature
of the space-time.
(Thanks for Harko's teaching) |
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