Einstein vs Newton: Does GR Disprove Gravitation?

[Bernard]

If Einstein proved that light (a massless object) can be bent because of space-time. Then what happens to Newton's gravitation equation F = Gmm/r^2. Obviously this cannot apply to light, so technically this should fall completely, having both Newton's and Einsteins discovery working at the same time can be confusing.

 

[A.T.]

If Einstein proved that light (a massless object) can be bent because of space-time. Then what happens to Newton's gravitation equation F = Gmm/r^2. Obviously this cannot apply to light, so technically this should fall completely, having both Newton's and Einsteins discovery working at the same time can be confusing.

https://www.physicsforums.com/threads/Newtons-gravitational-formula-wrong.800270/#post-5024706

 

[HallsofIvy]

That depends upon what you mean by "wrong". Einstein's theory differs from Newton's only in extreme cases, such as very large or very small mass, or two objects being extremely close.

 

[Nugatory]

As A.T. says above, we already have a live thread on this question. Please review that thread, and if necessary continue the discussion there.

This thread is closed.