How did Einstein Change Newton's law of Gravity of the Universe?

Answer 1

Newton: c=infinity, G=G, h=0

That blew chunkies when Maxwell united electricity and magnetism in the mid-19th century. c=infinity was no longer a good approximation. Einstein rederived Newton according to Maxwell.

Special Relativity, c=c,G=0, h=0
General Relativity, c=c, G=G, h=0

(GR postulates equivalence between the effects of a massive body and an accelerating geometry. That is convenient but unnecessary.) Newton was wrong. Observed light falling in a gravitational field is twice the value predicted by Newton but spot on for Einstein.

http://arXiv.org/abs/gr-qc/9909014
Amer. J. Phys. 71 770 (2003)
Phys. Rev. Lett. 92 121101 (2004)
falling light

Answer 2

Gravity in general relativity is not a force exerted by the masses on each but the mass itself bends space. Think of newtonian space as a flat table and einsteins space as looking similar to the table but ith dips in it where the mass is. Obviously this is a very crude picture and it is obviously far more complex as it bends space-time as well but thats a basic intepretation.

Answer 3

Newton's Laws were constructed assuming that an observer is within an inertial (stationary or uniform motion) frame of reference.

Einstein simply pointed out small discrepancies in determining motion by factoring in the motion of the observer in his Theory of Relativity (Relativistic Motion). This is small enough to be considered insignificant within small distances, but in the universe where distances between objects are usually very large, these discrepancies are magnified to considerable amounts.

Answer 4

Newton described gravitational attraction as a property of mass; all masses attract other masses. Einstein described gravitational attraction as the result of distortion of the "space-time continuum". He said that mass distorts or bends space-time. Therefore, any object which has mass will follow a curved path as it travels through the distorted space-time existing near another mass.