hohlrauml6d wrote: ----- Most of us know that 'equivalence' refers to the comparison of an inertial reference frame and gravity. In other words, there's no difference between gravity and inertia. -----
On the earth the gravitational field through me is slightly convex. (If that's hard to visualize, think of the field through the Pacific Ocean, say.) Can you guys think up any accelerated frame that could have a similar geometry? If not, that's at least one "simple" test for gravity v. inertia. Note that in a spinning torus designed to simulate gravity in space the effective field is approximately concave, which of course also differs. - Walter
