按照黎曼几何与广义相对论,粒子在引力场中自由降落时沿短程线运动.广义相对论采用弧长s作为变分参数建立短程线方程,得到粒子在球对称引力场的运动轨道.在太阳系弱引力场中做牛顿近似时,用到了弧长的近似条件ds=cdt.然而在引力场中这个近似条件是不合理的,它不但表示粒子静止,而且是静止在没有质量的自由空间中.本文证明,对于球对称引力场的施瓦西度规做正确的近似后,物体只能做抛物线运动(非周期运动),不可能做椭圆和双曲线轨道运动.为了避免近似计算的不确定性,本文进一步采用任意变分参数建立短程线方程,严格证明按照广义相对论,物体在太阳系弱引力场中只能做抛物线轨道运动,不可能做椭圆轨道运动.因此对于太阳系的行星轨道周期运动,广义相对论是无效的.本文还讨论了光在太阳引力场中的产生偏折的运动方程及其近似解.指出该解会导致自相矛盾的结果,因此它不是广义相对论运动方程的真正的解.原因在于爱因斯坦引力场方程是非线性的,其解不满足线性叠加原理,广义相对论关于光在太阳引力场中的偏折的计算与实际观察一致纯属歪打正着.本文同时证明,广义相对论对雷达波时间延迟实验的计算则是错误的,误差高达14.9％.因此广义相对论并没有得到实验的证实.爱因斯坦弯曲时空引力理论不可能成立,现代物理学的引力理论必须重建.%According to Riemannian geometry and general relativity,particles move along the geodesic when they fall freely in gravitational field.The arc length is taken as variation parameter to establish the motion equation of gravitational field.For the Schwarzschild metric with spherical symmetry,the approximate condition is used in the weak gravitational field of the solar system.However,this condition is irrational,for it means that particle is static in the free apace without mass.It is proved that when correct approximation is taken for the Schwarzschild metric,the obits of planets in the solar system can only be parabola (non-periodic),not be elliptic or hyperbolic.In order to avoid the uncertainty caused by approximate calculation,arbitrary variation parameter is used to establish geodesic equation.In this way,it is proved strictly that planets in the solar system can only move along parabola orbits rather elliptic orbits according to general relativity.So for the periodic orbit motions of planets in the solar system,general relativity is invahd.The motion equation of light's deflection and its approximate solution in the solar system are discussed in this paper.It is revealed that the solution of general relativity leads to contradiction,so it is not real solution.The reason is that the Einstein's equation of gravity field is non-linear.Its solution does not satisfy the principle of superposition.The consistence between the calculation of light's deflection and the practical observation is a lucky hit.The calculation of general relativity on the time delay of laser wave is also wrong with an error of 14.9 ％.The reason is analyzed in the paper.Therefore,general relativity has not been verified in experiments actually.The Einstein's gravity theory of curved space-time can not be tenable.The gravity theory of modern physics should be reestablished.
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