May I ask another question - how can one determine that time isn't moving backwards?
You can't.May I ask another question - how can one determine that time isn't moving backwards?
Hi jbriggs:If we arbitrarily re-label the future as the direction of high order and low entropy and the past as the direction of disorder and high entropy then a human being embedded within such a universe will observe an ordered "past" and a disordered "future" as he moves from future to past.
Right. We have a perfectly normal universe with past = order = low entropy over on our left and future = disorder = high entropy over on our right. We flip the whole thing end for end putting the ordered/low entropy part on the right and the disordered/high entropy part on the left. And we paste on new labels for "future" and "past" with "future" still on the right and "past" still on the left.This confuses me. If I ignore "arbitrarily", it seems to be saying entropy correlates with increasing order. My limited understanding of thermodynamics tells me that entropy correlates with increasing disorder. Consequently I am guessing that you are saying that you are "arbitrarily" redefining "the future" so that entropy correlates with increasing order.
Infact if time would "move" , with respect to what would it do it? With respect to the Time?If you think about it 'time' is a 'consequence' of an object's existence and it's relative speed in 'this' physical universe.
'Time' is not observable until an object shows up in this universe. To answer your question the 'movement of 'time' is not taking place at all. 'Time' is also NOT an illusion which humans defined. Think of it this way, the universe is dying a thermal death, and when the very last electron is left to die time would still be in force and there will be a measurable amount of time from the disappearance of the next of the last electron (if there was anyone there to measure it), until the last electron expires. 'Time' itself may expire in measurable amounts (relatively speaking), but it does not move.
Hi Levi:"How does time move forward?"
We need to at least explain what we mean by "move" in this situation. (We encounter a similar problem when distant galaxies "move" at superluminal speed.) "Move" can be a misleading term without further qualification.Since the verb "move" has been explained to be inappropriate, what other verb would you choose to express the concept of your intended question?
Which is why it is NOT normal to say that distant galaxies move away from us. The more well-defined (for that case) term is that they recede. Recession velocity is not proper motion, so there is no confusion.We need to at least explain what we mean by "move" in this situation. (We encounter a similar problem when distant galaxies "move" at superluminal speed.) "Move" can be a misleading term without further qualification.
Asking the question as "By what means does time progress" isn't really a question physics would answer. If I were to ask the physicists of the world to answer a question about time, it would be "Does time progress in discreet steps or is there infinitely smaller scales after milliseconds, nanoseconds, picoseconds..."Out of my own curiosity I've looked at questions that physics can't answer yet, and this one "How does time move forward?" Seemed to be the most interesting to me. Any Theories?
Hi David:To the original question, I reply; why do you think that time moves forward?
... You're really asking a question about human perception, not about time.
That accounts for a direction -- an "arrow" of time. It does not account for the rate. Lots of physical processes proceed at rates that correlate well with one another. So we calibrate a scale based on this and call it "time".My answer is the following.
A: As time advances from past to future, entropy increases.
Hi jbriggs:That accounts for a direction -- an "arrow" of time. It does not account for the rate. Lots of physical processes proceed at rates that correlate well with one another. So we calibrate a scale based on this and call it "time".
I think that particular question is about human perception, whether it was supposed to be, or not.Do you think that this Q and A is about human perception rather than about the physics of time?
How time advances from past to future is what I was going for.Hi Levi:
Since the verb "move" has been explained to be inappropriate, what other verb would you choose to express the concept of your intended question?
How does time advance from past to future?
What is physically taking place which corresponds to time advancing from past to future?
Hope this helps.