This is about time travelling ..i.e. pastpresentfuture
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1. "The Universe isn't stranger than we can imagine, its
stranger than we can't imagine."
2.
THE DIMENSIONS
SPACETIME
HOW TO TRAVEL TIME?
BLACK HOLE
WORM HOLE
WHITE HOLE
FOR WHAT IS THE TIME TRAVEL?
PARALLEL UNIVERSE THEORY
10/27/11 TIME TRAVEL 3.
The things in our daily life have height, width and
length.
According to many researchers, we can't see the fourth
dimension, or any other dimension beyond that.
Physicists work under the assumption that there are at least 10
dimensions, but the majority of us will never "see" them. Because
we only know life in 3-D, our brains don't understand how to look
for anything more.
10/27/11 TIME TRAVEL 4.
In physics, spacetime is any mathematical model that combines
space and time into a single continuum.
Spacetime is usually interpreted with space as
beingthree-dimensionaland time playing the role of afourth
dimensionthat is of a different sort from the spatial
dimensions.
By combining space and time into a singlemanifold, physicists
have significantly simplified a large number ofphysical theories,
as well as described in a more uniform way the workings of the
universe at both thesuper galacticandsubatomiclevels.
10/27/11 TIME TRAVEL 5. 10/27/11 TIME TRAVEL 6.
Light travels at about 300,000 kilometers per second (186,000
miles per second) -- that's pretty fast.
We see the moon as it was 1.3 seconds ago; the sun as it was
8.3 minutes ago; the nearest star 4.2yearsago; the most distant
galaxy as it was about 13.3billion yearsago. The most distant
object you can see with your naked eye is the Andromeda Galaxy and
even that is about 2.3 million light-years away, which means you
see it as it was 2.3 million years ago.
10/27/11 TIME TRAVEL 7.
Time travelis the concept of moving between different points
intimein a manner analogous to moving between different points
inspace.
Either sending objects backwards in time to some moment before
the present, or sending objects forward from the present to the
future without the need to experience the intervening period
The action of traveling through time into the past or the
future
10/27/11 TIME TRAVEL 8.
Some theories, most notably special and general relativity,
suggest that suitable geometries of space-time, or specific types
of motion in space, might allow time travel into the past and
future if these geometries or motions are possible.
10/27/11 TIME TRAVEL 9. 10/27/11 TIME TRAVEL 10.
We would require that you move faster than thespeed of light,
but we know that this cannot be done.
would require space-time to be very warped and a sort of
"tunnel" between two space-time points to be present (called a
"wormhole").
Such tunnels would not last long enough on their own for anyone
to travel through them (unless the traveler discovered some way or
built some machine which would keep the tunnel open).
There are all sorts of other conditions which would have to be
imposed on space-time in order for human beings to travel into the
past.
10/27/11 TIME TRAVEL 11. 10/27/11 TIME TRAVEL 12.
A black hole is a region of space that has so much mass
concentrated in it that there is no way for a nearby object to
escape its gravitational pull.
The speed with which you need to throw the rock in order that
it just barely escapes the planet's gravity is called the "escape
velocity.
10/27/11 TIME TRAVEL 13.
Now imagine an object with such an enormous concentration of
mass in such a small radius that its escape velocity was greater
than the velocity of light. Then, since nothing can go faster than
light, nothing can escape the object's gravitational field. Even a
beam of light would be pulled back by gravity and would be unable
to escape.
10/27/11 TIME TRAVEL 14.
A black hole has something called an 'event horizon.' This is a
spherical surface that marks the boundary of the black hole. You
can pass in through the horizon, but you can't get back out.
The horizon as the place where the escape velocity equals the
velocity of light.
10/27/11 TIME TRAVEL 15.
Outside of the horizon, the escape velocity is less than the
speed of light, so if you fire your rockets hard enough, you can
give yourself enough energy to get away.
But if you find yourself inside the horizon, then no matter how
powerful your rockets are, you can't escape.
10/27/11 TIME TRAVEL 16. 10/27/11 TIME TRAVEL 17.
A black hole is a region of space from which nothing can
escape, the time-reversed version of a black hole is a region of
space into which nothing can fall.
In fact, just as a black hole can only suck things in, a white
hole can only spit things out.
It is theoretically possible for a traveler to enter arotating
black hole, avoid the singularity, and travel into a rotating white
hole which allows the traveler to escape into another
universe.
10/27/11 TIME TRAVEL 18. 10/27/11 TIME TRAVEL 19.
A wormhole is a hypothetical topological feature of spacetime
that would be, fundamentally, a "shortcut" through spacetime.
The interior of a charged or rotating black hole can "join up"
with a corresponding white hole in such a way that you can fall
into the black hole and pop out of the white hole. This combination
of black and white holes is called a wormhole.
10/27/11 TIME TRAVEL 20. 10/27/11 TIME TRAVEL 21. 10/27/11 TIME
TRAVEL 22.
Time dilation is an observed difference of elapsed time between
two events as measured by observers either moving relative to each
other or differently situated from gravitational masses.
An accurate clock at rest with respect to one observer may be
measured to tick at a different rate when compared to a second
observer's own equally accurate clocks.
This effect arises not from technical aspects of the clocks nor
from the fact that signals need time to propagate, but from the
nature of space-time itself.
10/27/11 TIME TRAVEL 23. 10/27/11 TIME TRAVEL 24.
Time and distance are relative to each other.
As you travel close to the speed of light, the distance become
shortened and while time becomes lengthened.
For a person travelling at 99% of velocity of light, time slows
by 7 factor. 1 year is equivalent to 7 years for observer from
earth.
For 99.999% its about 230 years
For a velocity of light the time factor becomes zero
When it crosses the velocity of light the time becomes reduced
and runs in reverse time factor.
10/27/11 TIME TRAVEL 25. 10/27/11 TIME TRAVEL 26. 10/27/11 TIME
TRAVEL 27.
The multiverse is a theory in which our universe is not the
only one, but states that many universes exist parallel to each
other. These distinct universes within the multiverse theory are
called parallel universes.
Parallel universes basically say that space is so big that the
rules of probability imply that surely, somewhere else out there,
are other planets exactly like Earth.
In fact, an infinite universe would have infinitely many
planets, and on some of them, the events that play out would be
virtually identical to those on our own Earth.
10/27/11 TIME TRAVEL 28. 10/27/11 TIME TRAVEL 29.
The false vacuum began to decay, creating amazing amounts of
particles. These particles are the same as those which began our
universe.
There are two main ideas as to what these different universes
may contain. The first is that these universes are thesame in
matter and physical laws as our universe . For example, the oceans
would be where our continents are and vice versa, on and on.
The second idea is that theother worlds would potentially be
different in that they may not operate in the same way as ours does
. A three dimensional world may not be what the norm is.
10/27/11 TIME TRAVEL 30.
If, as humans, we were able to tap into the power of traveling
to these other universes, we would be able to meet our other
selves
If your own individual beings could meet and each one had
different experiences, think of the intelligence and knowledge you
could pass from one to another.
Each one would have different experiences and different
outcomes.
In one world you could be a doctor, in another world a
politician, in another world a drug addict. The options would be
virtually limitless.
10/27/11 TIME TRAVEL 31.
Nothing in the world is supposed to travel faster than
light.
But some neutrinos set off from Geneva and reached a lab
beneath the mountains in Italy 60 nanoseconds (billionth of a
second) faster than light would have, travelling a distance of 730
km. (I.e. About 12 Billion kms /sec)
10/27/11 TIME TRAVEL 32.
The news turned the world of physics upside down.
To be precise, it would turn the world of physics upside down
if the measurements prove correct.
Apart from many consequences to the currently-tested laws of
physics, it could lead to time travel.