- 2101
- Thinking what time is? Everything you see is younger when you see
it. It takes time for the light to reach
you and it is the speed of light that is constant. Time is variable it depends on where you are
and how fast you are moving. It even
gets more complicated. A glossary of many reviews about time follows in this review:
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--------------------------- 2101 -
Think about it, what time is ?
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7:32 A.M.
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No, not what time is it, What time is?
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Does time fly…………… or is it even moving?
Or, are we simply moving through it?
What is the it?
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Is time a structure in the Universe that has one dimension , flows in
one direction , and unfolds sequentially to separate events? Is time what keeps everything from happening
all at once?
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Or, is time not actually an entity.
It is not like the entity space where we actually travel through it.
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By 1915 Einstein had showed the world that time is not the “constant”
that everyone thought it was. Time flows
at different rates in different places in order to keep the speed of light
constant. Clocks just do not click the
same everywhere.
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The speed of light, the gravitational constant , the mass of an electron
are fundamentally “constants”. Time is
not constant. Time changes with gravity
and with rapid motion.
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We do not notice time is slowing down at our speeds because we are not
traveling fast enough. Once your speed
is 87% the speed of light time is slowing to half its normal rate. 87% is still 583,450,000 miles per hour. Orbital speeds are in the 17,000 to 25,000
miles per hour range. Can they even
notice time slowing down?
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The Global Positioning System, GPS, uses satellites orbiting Earth to
beam down signals that calculate distances to triangulate and determine any
position on the planet. The satellites
are traveling at high enough speeds that the calculations have to add time to
account for the slower clocks in the satellites. Higher speeds slower time.
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Then, because the satellites are in a weaker gravitational field in
orbit we need to subtract some time because weaker gravity accelerates the
clocks. Lower gravity faster time.
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Then, there is the gravity differences for the different altitudes on
the surface of the Earth. Every location
is a different distance from the center of the Earth. A closer location to the center experiences
slower clocks.
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Then, Earth is rotating at 1,040 miles per hour. Different latitudes experience different
rotational speeds. Faster speeds slow
down the clocks.
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Then, the satellites have
slightly elliptical orbits putting them at different distances from the center
at different times in their orbits.
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All of these factors affect the flow of time. Software in the calculation of distances must
take each factor into account. GPS
triangulations to locate accurate positions on the surface of Earth must add
and subtract the precise measurement data on location and speed. If the factors are not included the
positioning accuracy is within several miles.
With the calculations including the relativity factors the accuracy is
within a few feet.
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Here are some other Reviews about time, available upon request:
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#1621 Time to Think. - Your
brain has to do the same calculations to adjust positions with time, especially
astronomer’s brains. Everything seen
through the telescope is younger as you see that it is at the time you see
it. It takes time for light to reach
us, especially at astronomical
distances. Light from the Sun is 8
minutes old, and that is the closest star.
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The next closest star is 4 ½ years younger as we see it. It takes 4 ½ years for the light to reach us.
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#1341 Optical Lattice Clock.
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#1189 The Beginning of Time - If
you could run the clocks backward 13,700,000,000 years you would reach the
beginning of time. Thought to be the
creation of time and space.
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The end of time would be the end of endings.
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The boundaries of time seem to be the boundaries of our reasoning as
well
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#1006 Is Time slowing Down?
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#910 Time to Think, again
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No two times are the same if they are separated in space. Would time even still exist if there were no
space?
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Does time have something to do with “ entropy”. Entropy is the physic’s name for disorder,
randomness. Physic’s law states the
entropy in the Universe is always increasing.
The Universe constantly marches toward an equilibrium state where
everything is randomly the same. We
are always approaching that state of randomness. It takes energy to reverse it and we are
always dissipating energy. The death of
the Cosmos is the cold, random, equilibrium of our future.
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Randomness is the lowest energy state.
Nature is always seeking it. we
could say that time is a measure of “ change”.
And, if nothing changes , time is done.
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#854 Time, GPS, and Entropy
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#842 Pressed for Time
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#830 A 24 hour Day - Time
- How do you go from GPS time to
Universal Time, just add 19 seconds.
Why?
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#814 Fast Speed and Short
Time -
The smallest fraction of time is 10^-43 seconds. That is how long it
takes light to travel the smallest possible distance, 10^-35 meters. If a distance got any smaller it would become
a mini-blackhole ( See #724 and #734)
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#783 Time is what God
created - to prevent everything from
happening all at once.
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#747 Why 60 minutes.
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#356 - Time is Getting Short -
Zeptosecond pulses ( 10^-21) are used to study nuclear events in side an
atom. We are not there yet with our
technology. Attoseconds ( 10^-18) is
used to study electrons orbiting the nucleus in atoms. Femtoseconds (10^-15) measures chemical
reactions and the interactions of molecules.
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- #354
Jim’s Universal Calendar. History
from 10^-43 seconds to today summarized in 19 pages.
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#37 Deriving Time Dilation from
the Pythagorean Theorem. Sorry, that is
all the time I have. Bye for now, but,
stay tuned there is more to learn.
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--------------------- Wednesday, September
12, 2018 -------------------------
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