Aardwolf> Sun Feb 19, 2012 6:48 pm wrote:Goldminer wrote:Einstein loved his "Train Gedankens" didn't he? He used several of them. For the sake of those occupied with the idea that the platform/embankment/station is "fixed," Albert should have used a example of trains moving in opposite directions, no? Then the third frame of reference, the tracks, would be better visualized. Then Aardwolf could see that his arc is in the third frame, the track frame.
I have no problem with the arc being in its own frame as this will be the one that is stationary with respect to the ether. I only had one ship as stationary with it for simplification but I have no problem with the ships passing each other at some speed relative to ether; it just means that neither of their frames will be at the centre of the light sphere, they will just both be moving towards opposite sides of it. Makes no difference to absolute space theory.
You don't have a problem because there are some things which are unknown to you. No experiment has ever found a speed relative to the aether! If you know of one please cite the reference! The speed is relative to the spaceships. It can also be relative to the point between the spaceships. The speed of the ships relative to the point is one half the speed of the ships to each other. Get it? The point and the spaceships have no way of knowing their relative speed to the aether. I am sure that nothing makes any difference to "absolute space theory." It's definitely a spacey theory!
Aardwolf wrote: It just means that neither of their frames will be at the centre of the light sphere, they will just both be moving towards opposite sides of it
Now you are confusing the frames each ship occupies with the ships themselves. Yes, the expanding sphere will be centered upon the point which you claim in error to be at rest with the aether! Congratulations!
The frames are imaginary. They are useless, since each spaceship has no companions to be at rest with either ship. That is all frames do is keep those objects at rest with each other organized when discussing relative motion. All that an origin within a frame does is provide a common point from which distances to all objects within that frame can be measured. I know this explanation is useless to you. Maybe others will understand!
But, hey! Somehow in all your confusion you did get it right about the spaceships receding from the point where the light sphere was emitted. The flash from your arc has already passed the spaceships since they are going slower than the light sphere is expanding.