Originally posted by Tom
On speed…
First, what do you mean when you say that time and space are “experienced”? Time and space are not observable, apart from objects moving within space.[/color]
Our whole understanding of the universe comes from sensory-
experience. The reason that we know that time and space exist, is because we
experience them through our subjective sensations (and feelings), and then proceed to define that reality of experience using labels and mathematics (of our own making). Never forget that the Laws of Physics are founded upon human
experience.
Second, what does it mean for speed to be “as reliant as our universal-experience of ‘1 second’ and ‘1 meter’”?
See previous paragraph. 'Mathematical reality' is founded upon human experience. So is language. Even concepts are derived from an analysis of experience.
I ask these questions because I think they are the key to the mistake in your last sentence.
There's no mistake. The Laws of Physics are founded upon
human experience, via the senses.
What is “the ‘value’ of space & time”? You say that SR depends on it, but to me it has no discernable meaning.
Then you denounce existence itself. For existence is known through our experiences, and the value which those experiences hold for us.
The mathematics of our experiences are founded upon the value that exists within experience itself.
Since mankind was responsible for labelling his own experiences, we must assume that there is 'value' in mankind's
perception of time & space.
This is also misleading. What does a meter “feel” like?
The 'meter' has been defined already, by people more able than myself (mathematicians & physicists), in relation to a common
experience of the space we
perceive, and the matter in it. I have no greater language than those physicists, to express to you how I
perceive of one meter through space.
What does a second “feel” like? The questions are meaningless,
It's not meaningless Tom. Because if we didn't have a clue what 1 second "felt" like (as in our
sensation of change), we would never have been able to define '1 second' so that we all understood it.
There is no sense in which the twins experience time and space differently.
So; one twin ages 30-years, for example, less than his brother (mentally and physically, we must assume); yet you say there is no sense in which these twins have experienced time & space differently.
That's a remarkable conclusion Tom. And I see no sense in it.
In fact, this is one of the main motivations of SR: that one should not be able to tell what one’s state of motion without referring to the outside world.
I understand that. But if we are to accept 'motion' as a real phenomena, and we note that the motion of the observer
does affect the spacetime-universe he perceives (as evident in the twin-paradox); then the only conclusion is that the observer's perception of self-motion (that he has velocity), has distorted that observer's perception of his own space-time (in relation to other observers). I.e.: the observer's perception of self-motion is the underlying source of how he shall see the rest of his universe (space-time), in comparison to that motion.
In other words: the way an individual experiences time & space, in comparison to me, is dependent upon how
he is seeing his own space & time in relation to his own perception of self-motion in relation to everything else.
I refer to the outside-world to know my own state-of-motion. But when I accelerate in reference to this previously known-state, I am now the
cause for distorting spacetime - and my new experience of space-time will not correlate with my previous experience of spacetime. So; self-motion is the underlying-cause of a specific spacetime-experience.
There is no reason to say that we all see and feel different realities. It is equally plausible to say that there is one external reality that we all view from different points of view, and that that is where the differences come from.
I made this point to Njorl. Ultimately, there is only one reality - of course. The fact that we see so many diverse opinions of this reality is actually a proof that the mind is holding reality to ransom. That the mind is responsible for the reality it is seeing.