geordief Posted March 19 Share Posted March 19 Suppose we have a trampoline moving through the vacuum of space At any snapshot in time (so not 4d) the trampoline will look to us in it's normal flat shape Now let us say that a region of the trampoline is subject to an acceleration (for simplicity perpendicular to the surface) so that that region is stretched into the shape all trampoline analogists are familiar with except that there is no heavy metal object producing the "well" but rather the shape is produced "internally " by the local acceleration.** So an observer at a remove from the "flying trampoline" will see a flat surface with a protrusion a bit reminiscent of Sigourney Weaver's belly in Alien. If we now put ourselves in the frame of reference of the flat part of the surface and look around at what we can see from that frame then we will see whatever we will see. But if we similarly look around from the region of the protuberance (if the acceleration has been significant) then the same scenes will be visually distorted and light coming from the same place as was seen by the people on the flat ,unaccelerated region of the trampoline will be coming from a different direction and either sped up or slowed down.(am a little unclear here) Does the trampoline viewed this way provide a good model, not of gravity but of the effect of how light is curved when a frame of reference is accelerated wrt a source of light? Does the trampoline analogy work better for acceleration than gravity? ,**it is just a small,local region of the trampoline that is accelerated and not all of the trampoline. Link to comment Share on other sites More sharing options...
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