Michael V wrote:Goldminer,
Speed of Light 1.jpg
A group of observers are "at rest" with respect to each other and are located at positions C, D E, F, G and H.
An object is travelling at 0.5c relative to all the observers. At time=t, when at position A, which happens to be equidistant from all the observers, the "source" object emits a short pulse of light spherically. The source then continues to travel onward with no further emissions. At time=t+x, the source object has travelled further along and is now at position B. The pulse of light that was emitted at time=t from position A has expanded to reach the "at rest" observers.
All the observers will see the image of the source in the position that the light was emitted - they will see the source object image at position A, even though the source object itself it now at position B.
According to your theory, of course. (
Curt Renshaw has already thought of your idea, and he thinks it is great!* His only problem is that the idea requires millions of "expanding spheres."
Plus, his "spheres" don't expand! See his figure #5
You haven't caught on to the fact that light travels away from the source at c. That means that observers at rest with the source will all see the pulse at the same time if they are the same radial distance from the source when the pulse travels the radial distance from the source.
In your diagram the observers are in a different frame of reference, one in motion with the source. These observers will only see the pulse simultaneously with each other when they are centered on the source, just as the
at rest with the source observers all see the pulse simultaneously. They have to be centered upon the source too, in order to see the pulse, but only for an instant, since they are in relative motion.
Not to mention that the moving observers will see Doppler shift, and those with a transverse view will see the position aberrated. The Doppler shifting and aberration should tell you that the observations in the moving reference frame are quite different than the observations in
the at rest with the source reference frame. The
at rest with the source reference frame is unique because that is where the light pulse is emitted and moves away from the source
there at the speed of light.
There is only one expanding sphere of light.
It doesn't stop being centered upon the source just because a group of relatively moving observers want to see it simultaneously with each other!
Using your theory, (or Curt Renshaw's) there would have to be an infinite number of expanding spheres to accommodate all the spherical groups of observers that might be going whichever way at whatever speeds. Now, that there really makes a lot of sense!
Einstein's theory is a sophomoric attempt at explaining the situation. I can understand the confusion though. None of these early theorists were able to think in terms of light traveling a foot per nanosecond. When this simple shrinking of the space necessary to diagram the situation is considered, one can concentrate on the mechanics.
Albert's idea that the speed of light from a relatively moving source should measure the same speed as the local, source centered speed has never been directly measured. JPL used the simple c+v, c-v in calculating the radar ranging of the planets back in the 1960's without using Einstein's formula. This is explained in Bryan Wallace's "The Farce of Physics" book. Search for it. If you can't find it, PM me.
Michael V wrote:Goldminer wrote:We see the activities happening on the surface of the Sun 8 minutes after they happen, and we see a new area of the Sun as we orbit it, 8 minutes after we passed over that area, but we see the Sun right where it is, just the same as if it were in the middle of a field and we drove a circle around it. Why is that? Because the Sun is basically at rest with this part of our Galaxy and the Earth simply orbits it as if it (the Sun) is not moving with respect to the Galaxy.
I really do not see how you might have come to this conclusion. The speed of light is constant and limited to c. That the Earth additionally travels in orbit is irrelevant and certainly not any kind of compensation factor the the speed of light flight time from the Sun.
You will never see this from your point of view. Even though the Earth is "moving" in orbit, for the purpose of seeing the position of the Sun, the Earth is at rest with the Sun. i.e, its radial distance is not changing. As an observer on the Earth receives each new wave front (a different ray, because the observer has moved transversely to the incoming beam) from the Sun, that observer does not have to wait another 8 minutes to see it. That new ray arrives just a nanosecond or so after the one already seen. The Earth is not moving away from the Sun, as you picture it in your diagram.
What is irrelevant is what the rest of the galaxy is doing, for the better part.
BTW, inertial motion is relative. I don't know if very many people see this though. Any momentum an inertial object has can only be determined by reference to some other object.
Michael V wrote:Goldminer wrote:Your condescending attitude really pisses me off, BTW.
I offer my apology. Michael
Your need to act superior in your posts is actually a sign of inferiority on your part. So why don't you just treat the rest of us as equals? It is not hard to do.
* I have done a critique of Renshaw's article, which I can email to you, if you or anyone are/is interested.
I sense a disturbance in the farce.