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en
As you read this sentence, you probably think that this moment—right now—is what is happening. The present moment feels special. It is real. However much you may remember the past or anticipate the future, you live in the present. Of course, the moment during which you read that sentence is no longer happening. This one is. In other words, it feels as though time flows, in the sense that the present is constantly updating itself. We have a deep intuition that the future is open until it becomes present and that the past is fixed. As time flows, this structure of fixed past, immediate present and open future gets carried forward in time. This structure is built into our language, thought and behavior. How we live our lives hangs on it.
Yet as natural as this way of thinking is, you will not find it reflected in science. The equations of physics do not tell us which events are occurring right now—they are like a map without the “you are here” symbol. The present moment does not exist in them, and therefore neither does the flow of time. Additionally, Albert Einstein’s theories of relativity suggest not only that there is no single special present but also that all moments are equally real [see “That Mysterious Flow,” by Paul Davies; Scientific American, September 2002]. Fundamentally, the future is no more open than the past.
http://www.scientificamerican.com/artic ... -illusion/" onclick="window.open(this.href);return false;
Vraag: Stel een universum met 2 objecten welke beide niet bewegen. Is hier sprake van tijd(sverloop)?
SUMMARY
1. We measure time by comparing one standard motion against another. Time may not have any independent existence. Time and
clocks are used for convenience. The motion could have been compared directly.
2. Motion alone is not enough to explain time. Forces also appear to be part of time. Arrow of time may be explained if we think of
time as presence of forces and motion.
3. Perception of time as past present and future gives us the illusion of the passage of time as well as the block universe view of
time. Above it is shown that this perception may just be an illusion and time is more like memory and recording devices.
The similarity of time characteristic of past present and future in historical events and made up stories also suggests that our
perception of time is an illusion and this aspect of time is also like a record. The fact that the present which gives us the most
real feel of time cannot be measured while the inaccessible past and future can be measured as durations strongly suggests
that the way we perceive time (present-ism or the block universe view) is an illusion.
4. Slowing of time in motion and gravity does not lead to disappearance into the past as should happen if there was block universe.
Absence of time travellers from futuristic advanced civilizations is also against the concept of the block universe.
5. The concept of origin of the universe in the Big Bang is at complete odds with the block universe view of time. If the block universe
which is supposed to be laid out as a time-scape (from the past to the present to the infinite future) exists and began in big bang
then it would mean that all of the time up to the infinite future would come into existence in the instant of the big bang. This idea is
truly preposterous.
6. Slowing of time in gravity and in motion as well as the ultimate speed limit c provides us the necessary clues to understanding the
cause of the phenomenon of time however we need to first convince ourselves that time is a process that is linked to motion and
forces and the block universe view of time is not correct.
UIT:
http://www.timephysics.com/" onclick="window.open(this.href);return false;