viewtopic.php?p=1650#1650
Gregg writes:
Gregg, what is the basis of that assertion? Are you not sayng that 'gravity exceeds light-speed" ?greggvizza wrote: he may have been so focused on making it work that he overlooked the fact that the signal does not propagate like electromagnetic waves, it is everywhere at the same time, instantly at the ends of the universe, it doesn’t have to travel.
There is some debate about that in scientific circles. Again, I'm thinking of Brian Green, who goes into some depth on the subject in "The Fabric of the Cosmos."
He makes this case: if you're in a rowboat at high tide, at night, and the full moon was suddenly snatched out of the sky, would the tide suddenly settle (intantaneous effect) some time before you saw the light from the moon disappear? Would you feel the "gravitational" effect before you saw the "optical effect"?
I don't remember the reasoning now (but I'll look it up if you'd like) but Green says that both effects would reach you at the same time, i.e. gravity effects would also travel at the speed of light.
Can you tell me what allows you to conclude otherwise?
I'm not disputing your conclusion, I just want to make sure I can follow your logical reasoning to it. We need to make sure the wagon is sturdy, because we want to get alot of people on board.
--PS