Good point but why “no bowling ball on a trampoline nonsense”? That’s not a correct analogy, since it deforms “space” different from how gravity transforms space, but it’s good enough to understand how that works, I think
Oh because that incorrect analogy is the most common “lay person” analogy for describing gravitational curvature of spacetime. The most common reply from children is that it’s the earth’s gravity pulling down on the bowling ball so that the trampoline demonstration wouldn’t work in space.
Also the trampoline analogy doesn’t show us how gravitational lensing works, nor does it even touch how different gravitational reference frames affect the passage of time (GR generalizes special relativity, after all).
Good point but why “no bowling ball on a trampoline nonsense”? That’s not a correct analogy, since it deforms “space” different from how gravity transforms space, but it’s good enough to understand how that works, I think
Oh because that incorrect analogy is the most common “lay person” analogy for describing gravitational curvature of spacetime. The most common reply from children is that it’s the earth’s gravity pulling down on the bowling ball so that the trampoline demonstration wouldn’t work in space.
Also the trampoline analogy doesn’t show us how gravitational lensing works, nor does it even touch how different gravitational reference frames affect the passage of time (GR generalizes special relativity, after all).