Quote (thorsjsp @ Oct 22 2013 10:40pm)
I know there is not a speed of infinity, I said that. It's better described as a constant force. I don't think there is a speed of empty space either, but rather a rate that it expanded at the big bang (which would still be the current rate because there was/is no matter for the matter of our universe to be slowed down by). An object that is in motion will not change its velocity unless an external force acts upon it.
First, infinity is nothing but a mathematical construct that is a result of equations, essentially, not working (I think its more complex then that, but its the basic idea. And some might argue that infinity really does exist, but thats a different argument).
By speed of empty space, it appears you mean the expansion of the universe. Because we can DIRECTLY measure this rate of expansion through the dopplar shift in light; light that is being "stretched" by the expanding universe is red shifted.
And thanks for the Newtonian lesson.
Consider this (some metaphysical ideas I have had):
The universe, to our knowledge, is essentially uniform. That means if you measure radiation coming from every direction, its approximately the same. Now, the funny thing about the universe is that this radiation measurement holds at other points in the universe, suggesting that there is no center, but rather every point is the center. Now one must consider the finite nature of the speed of light. What if, instead of being on earth, you were 10 billion light years away? What would the universe look to you then? The "edge" of the observable universe is measured to be about 13.7 billion lightyears away. I would argue (off zero experimental data) that the universe, 10 billion light years away, would look EXACTLY THE SAME!!!! I like to state it as such: The universe is an expanding hypersphere (4 dimensional sphere), where the "radius" of this sphere is time (but think about what the radius of a 4 dimensional sphere would be o.O), and as time progresses this radius increases, thus increasing the surface area of the sphere, and THUS allowing us to view more of the universe.
Now as an analogy, consider a regular 3d sphere. If you sat on it and looked around, you would see a finite amount of space. However, if the radius of the sphere itself increases, then the amount of area you can view from your point on the sphere increases. That is the general idea, of well, my idea.
Take this all with a grain of salt. I have a degree in physics but I dont claim to know much. If you are really interested, I always tell people to watch Leonard Susskind's physics lectures on youtube. He has at least 4-5 different FULL SEMESTER series, including quantum mechanics, general relativity, and string theory. Wiki is also a fabulous start - much of the scientific information on pages such as
http://en.wikipedia.org/wiki/General_relativity is accurate (and if you dont believe the text, refer to the citation). Physics is awesome and there is lot to be learned. And the best part is that there is more to learn and always new discoveries waiting!
Edit: as an aside, I really dont know what the point of your post is. What do you want to explain? You need to define the speed of infinity and speed of empty space.
This post was edited by khemist on Oct 22 2013 11:58pm