- #1
SamRoss
Gold Member
- 254
- 36
Newton's law of gravitation cannot be compatible with relativity because the gravity from a massive object applies a force to all other masses infinitely fast. General relativity is supposed to correct this flaw by setting a speed limit on how fast the effect of gravity can reach a distant object. (1) How can one derive the speed of gravity from the EFE? (2) Is this speed c? (3) Is this what is meant by gravitational waves?