- #176
JArnold
- 21
- 3
I'm just joining this long discussion, and it may be inevitable that my contribution will only be annoying. But there are basic and well-established principles that should guide the discussion: Uniform motion is relative; inertial acceleration and gravitational effects are absolute. In the former case, observers will mirror each other's experience of retarded clock speeds; they will each say the other's clock is moving more slowly. In the latter case (and our GPS system relies on actual time dilation): clocks move more slowly according to the intensity of their location in a gravitational field and according to their subjection to a force (as can be experimentally confirmed).