- 2059
- Time, why
does it move forward? Any universal
concept of time must ultimately be based on the evolution of the Universe. The fact that the night sky is dark tells us
that space and time are expanding. The
faster you move relative to someone, the slower time will pass for you relative
to our perception of time.
-
-
-
-
--------------------- 2059 Time, why does it move forward?
-
- I have over 18 Reviews about
Time. All available upon request. It is a difficult subject. This Review, #2059, follows after a list of
highlights found in previous reviews.:
-
- (1) Review #1992
- Time , mysteries still
unfold. General Relativity changed our
thinking about time. Increasing entropy
is causing increasing quantum entanglement.
Metric Tensor math defines curved spacetime due to gravity.
-
- (2) Review #1174. - Time is a fundamental concept that Quantum
Mechanics and General Relativity disagree about.
-
- (3) #1735
- Time is only strange if you
think about it. Mass is only a
concentrated form of energy.
-
- (4) # 1691
- Time moves slower as you move
faster. Gravity is the curvature of
spacetime.
-
- (5) #1621
- Everything you see is younger
than when you see it.
-
- (6) #1189
- No two times are the same if
they are separated in space.
-
- (7) #356
- Zepto-seconds used to study
the motion of atoms.
-
- (8) #354
- The Universe calendar starting
at 10^-43 seconds and going to year 80,000. It is several pages long.
-
- (9) #37 -
Deriving the Time Dilation equations using the Pythagorean Theorem.
-
-----------------------------------------------------------
-
- --------------------- # 2059 Time, why does it move forward?
-
- While we take
for granted that time has a given direction most physicists maintain that most
natural laws are “time reversible”.
This means they would work just as well if time were defined as running
backwards. So why does time always run forward?
-
- Any universal concept of time must ultimately
be based on the evolution of the Universe.
It has a beginning and it has an end.
In between is time. When you look up into the night sky you are seeing
events that happened in the past. It
takes light time to reach us. In fact, even the simplest observation can help
us understand cosmological time.
-
- The fact that
the night sky is dark tells us that space and time are expanding. If the
universe had an infinite past and was infinite in extent, the night sky would
be completely bright, filled with the light from an infinite number of stars in
a cosmos that had always existed.
-
- For a long time scientists, including Albert
Einstein, thought that the universe was static and infinite. Observations have
since shown that it is in fact expanding at an accelerating rate. This means that it
must have originated from a more compact state then expanded as the Big Bang,
implying that time does have a beginning. If we look for light that is old
enough we can even see the relic radiation from Big Bang that is the Cosmic
Microwave Background.
-
- Einstein’s special theory of relativity,
shows that time is relative. The faster
you move relative to someone, the slower time will pass for you relative to our
perception of time. So in our universe of expanding galaxies experiences of
time vary. Everyone’s past, present and
future is relative.
-
- It turns out that because the universe is on
average the same everywhere, and on average looks the same in every direction,
there does exist a "universal time”. To measure it, all we have to do is
measure the properties of the cosmic microwave background. Cosmologists have
used this to determine the age of the universe to be 13,800,000,000 years old.
-
- In the dimension of space, you can move
forwards and backwards. But time is
different, it has a direction, you always move forward, never backwards. So the
fact that the dimension of time irreversible is one of the major unsolved
problems in physics.
-
- To explain why time is irreversible, there
is a processes in nature that is also irreversible. Entropy in physics is that
things tend to become more randomized as time passes. Entropy only has one direction. Disorder is always increasing on the grandest scales.
-
- Imagine a box of gas in which all the
particles were initially placed in one corner ( state of order ). Over time they would naturally seek to fill
the entire box (a state of disordered, and randomness ). To put the particles back into an ordered
state would require energy. This is irreversible. It’s like cracking an egg to
make an omelet. Once it spreads out and
fills the frying pan, it will never go back to being and egg again. It is the
same with the universe. As the universe evolves, the overall entropy always
increases.
-
- It turns out entropy is a pretty good way to
explain time’s arrow. And while it may seem like the universe is becoming more
ordered rather than less. The universe
is going from a wild sea of relatively uniformly spread out hot gas in its
early stages to stars, planets, humans.
It is nevertheless possible that it is increasing in disorder. That is
because the gravity associated with large masses is pulling matter into seemingly
ordered states. The increase in disorder that we think must have taken place is
somehow hidden away in the gravitational fields. Disorder could be increasing
even though we don’t see it.
-
- Given nature’s tendency to prefer disorder,
why did the universe start off in such an ordered state in the first place?
This is still considered a mystery. Some researchers argue that the Big Bang
may not even have been the beginning, there may in fact be “parallel
universes" where time runs in different directions.
-
- Time had a beginning but whether it will have
an end depends on the nature of the dark energy that is causing the universe to
expand at an accelerating rate. The rate of this expansion may eventually tear
the universe apart, forcing it to end in a Big Rip. Or, dark energy may decay, reversing the Big
Bang ending the Universe in a Big
Crunch; or the Universe may simply expand forever.
-
- Would any of these future scenarios end
time? According to the strange rules of
quantum mechanics, tiny random particles can momentarily pop in and out of a
vacuum. Some have argued that dark energy could cause
such “quantum fluctuations” giving rise to a new Big Bang, ending our time line
and starting a new one. While this is extremely speculative and highly
unlikely, what we do know is that only when we understand dark energy will we
know the fate of the universe.
-
- Time is simply a defined instrument for
measuring increments of change in the material universe. Without change, time
is meaningless. With the constancy of various laws, we have the ability to
accurately measure prior change "before," predicting future changes
of many things that will occur "after," and all increments in
between.
-
- The reason why time is such a mystery is
because it is dependent upon the expansion of space. It is a linear function of
the invisible absolute expansion of Universe space into the infinite Void of
non-Universe space. There was no Big Bang! The Universe is expanding everywhere
from within, and this creative expansion causes all that we see as the
existence of the Universe.
-
- Actually the time does 'move' backward. Our
memories go back in time along with everything else. It only seems to us that the time is moving
forward because our memories are only recording the events of past.
-
----------------------------
----
Comments appreciated and Pass it on to whomever is interested. ----
---
Some reviews are at:
--------------
http://jdetrick.blogspot.com -----
--
email feedback, corrections, request for copies or Index of all reviews
-
to: ------- jamesdetrick@comcast.net
------ “Jim Detrick” -----------
-
https://plus.google.com/u/0/ -- www.facebook.com -- www.twitter.com
------------------------- Thursday, April 12,
2018 --------------------------------
No comments:
Post a Comment