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Topic: Time dilation

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In the News (Mon 20 Nov 17)

Time is the basic measurement of the activity of our senses, by which we calculate past, present and future; but in factual calculation, time has no beginning and no end.
By the influence of eternal time, which is a representative of the Supreme Personality of Godhead, the father begets a son, and the father dies by the influence of cruel death.
Time scatters everything, exactly as the wind scatters clouds in the sky." (SB "Since the material body is sure to be vanquished and the duration of one's life is not fixed, neither death nor life is to be praised.
www.veda.harekrsna.cz /encyclopedia/time.htm   (4684 words)

 Time dilation - Wikipedia, the free encyclopedia
5.2 The spacetime geometry of velocity time dilation
Time dilation by the Lorentz factor was predicted by Joseph Larmor (1897), at least for electrons orbiting a nucleus.
Time dilation is used in The Matrix (called bullet-time by the directors) to exaggerate the speed of the "Agents" and Neo, as well as to further establish the fact that something is not right about the Matrix, relative to the real world.
en.wikipedia.org /wiki/Time_dilation   (3487 words)

 TIME DILATION   (Site not responding. Last check: 2007-10-18)
Time dilation is an observed phenomenon that from the viewpoint of two observers is a mathematical reality.
Looking at time dilation from another reference frame other than one of the two particle locations, directs us towards the fact that time itself is not slowed down but merely that the measurability of visible clock time from the mathematics of one observer locations will differ from another observer location.
The observed time dilation is by a factor of 7;1, the prediction is 7.0888.
watermanpolyhedron.com /TIMED.html   (1243 words)

 Time - MSN Encarta
Motion and gravity effect time by dilating (slowing) it or by expanding its duration.
Time dilation effects due to motion were experimentally observed in the early 1970s.
If the effect of Earth's rotation is removed, the time dilation produced by the motion of the airliners confirms Einstein's theory of how time changes with motion, as the dilation is in agreement with predictions made by the theory.
encarta.msn.com /encyclopedia_761561386_4/Time.html   (416 words)

 Time Dilation
time).) Since the speed of light is precisely the same for both observers, the time t elapsed in that frame is related to the distance D traveled relative to O by a similar relation: D = ct.
The time dilation factor is only relevant when the relative velocity is a significant fraction of the speed of light.
In accordance with the time dilation effect, the physical process responsible for muon decay appears to be running slowly when viewed from the Earth.
theory.uwinnipeg.ca /mod_tech/node135.html   (1388 words)

 Time Dilation   (Site not responding. Last check: 2007-10-18)
Special Relativity states that time is measured according to the relative velocity of the reference frame it is measured in.
Interestingly, while time expands from the perspective of the stationary observer, space contracts from the perspective of the moving observer.
Unfortunately, time dilation is completely outside of human experience, because we have not yet devised a way of travelling at speeds where relativistic effects become noticeable.
www.thebigview.com /spacetime/timedilation.html   (1305 words)

 Causality and Time Dilation
Time, therefore, represents a means to measure the temporal order of events.
It must be clearly understood, that we are not stating that causality is violated; in fact, it is quite to the contrary.
Thus, when an object is experiencing acceleration, such as a gravitational or electrical field, an increasing time dilation factor is present relative to objects outside of such fields.
www.orbits.00space.com /time.html   (1050 words)

 C-ship: The Dilation of Time   (Site not responding. Last check: 2007-10-18)
By the time we reach 90% of the speed of light, for each day on board, two and a quarter days pass for an observer stationary with the respect to the Lattice.
Since time dilation affects the rate at which time passes, the total discrepancy between stationary and moving clocks increases throughout the voyage.
You'll see dilation of time in action when we embark on a mission to fly through the Lattice.
www.fourmilab.ch /cship/timedial.html   (424 words)

 Shockwave Physics Studios - Time Dilation Activity
According to Einstein's theory of special relativity, the observed time for events is dependent upon the speed of the observer relative to the speed of the reference frame in which the events are occurring.
Suppose that a spaceship was equipped with a pair of mirrors separated by one meter, an accurate clock which measures time to the nanosecond, and a source of light.
Tutorial information on time dilation and Einstein's theory of special relativity is available in Unit 7 at The Physics Classroom.
www.glenbrook.k12.il.us /gbssci/phys/shwave/tdilate.html   (288 words)

 Hafele-Keating Experiment
Relative to the atomic time scale of the U.S. Naval Observatory, the flying clocks lost 59+/-10 nanoseconds during the eastward trip and gained 273+/-7 nanosecond during the westward trip, where the errors are the corresponding standard deviations.
In this experiment, both gravitational time dilation and kinematic time dilation are significant - and are in fact of comparable magnitude.
Hafele and Keating predicted a time difference of 144 ns on an eastward flight around the world for which the flight time was 41.2 hours.
hyperphysics.phy-astr.gsu.edu /hbase/relativ/airtim.html   (859 words)

 View topic - TIME DILATION
The reason: The net time differential when the movement of the clock is complete is the same as though dilation time was operative throughout, whereas it was Doppler time operating.
It is worth repeating that according to the time dilation concept a clock in the approach mode runs slowly— but astronomers observe clocks in the approach mode, and they are running fast.
Time dilation is the applicability of the applicable Lorentz transformation to time.
www.anti-relativity.com /forum/about47.html   (6926 words)

 Time dilation on the road
This spotlight topic is about one such analogy, designed to make more accessible some of the properties of relativistic time dilation and the relativity of simultaneity.
Instead of hikers on different roads, we examine observers in relative motion (to be precise: inertial observers), with a larger angle between two roads corresponding to a higher relative speed of two observers.
The relativistic analogue of this is time dilation: From the point of view of each of two observers in relative motion, the other observer's clocks will run slower than his own.
www.einstein-online.info /en/spotlights/time_dilation_road/index.html   (1218 words)

 The Time Dilation - what das it mean ?
Anyway, such explanations show us symmetry in time dilatation effect and for non symmetrical time observations it is necessary to use considerable time changes when we change inertial system or we are moving with acceleration.
The metre is the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second.
Talking something about "real" time from the point of STR lead to results, whose break the rule of the constant speed of light, which is the base rule of STR..
www.geocities.com /Athens/Forum/1755/my_relat.html   (2523 words)

 Gravitational Time-Dilation
This is a "time delay" test associated with a photon as it passes through a gravitational field.
Once the cumulative delay is determined, then this time delay would need to be corrected relative to the influence the gravitational field of the bodies that produce this delay have upon a timing device, say, located at the earth's surface.
It was at that time that the mathematical properties of the infinitesimals first appeared as a portion of his discovery.
www.serve.com /herrmann/time.htm   (4633 words)

 Time dilation/length contraction
A clock in a moving frame will be seen to be running slow, or "dilated" according to the Lorentz transformation.
The time measured in the frame in which the clock is at rest is called the "proper time".
Upon being introduced to special relativity for the first time, it is easier to contemplate concepts like the speed of light as the speed limit of the universe by envisioning the mass as increasing to infinity at velocity c.
hyperphysics.phy-astr.gsu.edu /hbase/relativ/tdil.html   (431 words)

 Special Relativity: What Time is it?
We have already noted one counter-intuitive consequence of this, that two different observers moving relative to each other, each measuring the speed of the same blob of light relative to himself, will both get c, even if their relative motion is in the same direction as the motion of the blob of light.
Time dilation is very easy to observe in elementary particle physics, as we shall discuss in the next section.
Their actual speed is about 0.994c, corresponding to a time dilation factor of about 9, so in the 6 microsecond trip from the top of Mount Washington to sea level, their clocks register only 6/9 = 0.67 microseconds.
galileo.phys.virginia.edu /classes/252/srelwhat.html   (2001 words)

 TIME THEORIES   (Site not responding. Last check: 2007-10-18)
Time Dilation is a "time average" taken by the phenomenon to emit the energetic particle or photon (lifetime).
Now a question can be raised, can these photons be misplaced or lost in time, thus the time dilation theory, which also can be helpful to understanding and qualifying better equations.
The Musician many times has a gift or a talent to draw from a higher transcendent source of inspiration as Beethoven did in composing his music, so perhaps Psalms dedication to the chief musician is a deeper clue then we imagined.
members.tripod.com /~MikeNight/time.html   (889 words)

 Relativity Tutorial
Because the clocks of different observers run at different rates, depending on their velocities, the time for a given observer is a property of that observer and his worldline.
Proper time is invariant when changing reference frames because it is the property of a particle, not of the reference frame or coordinate system.
Going too far upward requires moving so fast that time dilation due to motion reduces the proper time more than the gravitational speedup, so there is an optimum curvature to the worldline that maximizes the proper time.
www.astro.ucla.edu /~wright/relatvty.htm   (4024 words)

 Halfbakery: Time dilation
From the reference frame of the person on the spaceship, the Earth and its inhabitants are the ones moving fast and would, therefore, appear to be experiencing time dilation.
With a spaceship traveling near the speed of light in a straight line, it would be hard to study effects such as time dilation and length contraction.
As far as using time dilation to "freeze frame reality", it is of course impractical with current technology to accelerate anything larger than a few subatomic particles to speeds near c (the speed of light).
www.halfbakery.com /idea/Time_20dilation   (1548 words)

 Time Dilation and Twin Paradox Debunked
This factor γ corresponds to the amount of 'length contraction' and 'time dilation' that, according to Special Relativity, should be taken into account if transforming length and time units between different reference frames moving relatively to each other with non-zero velocity.
The conclusions of time dilation and length contraction are hence invalid because they are based on a set of equations that is inconsistent with physical principles.
Some physicists claim that the situation would in practice not be symmetric as one observer has to turn around in order to compare the clocks (see for instance http://www.phys.vt.edu/~jhs/faq/twins.html), but it is clear that this argument does not hold water as the time dilation should already be apparent before one observer turns around.
www.physicsmyths.org.uk /timedilation.htm   (362 words)

 Time Dilation   (Site not responding. Last check: 2007-10-18)
This is explained due to the fact that the astronaut's twin is traveling at relativistic speeds and therefore his "clock" is slowed down.
So at relatively slow speeds (our everyday speeds) time dilation is not a factor and Newton's Laws are still applicable.
Also notice that the closer one gets to the speed of light the greater impact speed has on time dilation (notice how steep the curve gets towards the end)..
www.phy.olemiss.edu /HEP/quarknet/time.html   (419 words)

 Time Dilation - 12/08/99
Bear in mind Keely's claim that 'Time is Gravity' indicating that gravity clocks the aging of matter which we 'perceive' as time.
Choosing to remain here in a time dilation field for a hundred years or so, which to them would be a few hours or days, then step back out to start a new life.
as compared with the time dilation effect where there is a RATIO of difference between the speed of time in a 'fairy circle' and the speed of time on the large volume/density of the Earth.
www.keelynet.com /time/tdilation.htm   (4341 words)

 Curious About Astronomy: What is time dilation?
In books on time dilation I see many examples of completed problems of what would happen in such journeys out into space.
Length contraction and time dilation are both effects of Special Relativity, which take place when an object is travelling close to the speed of light.
The Earthbound twin also observes that the spaceship travelling at a speed 0.9c is 2.29 times shorter than it was before the launch.
curious.astro.cornell.edu /question.php?number=67   (454 words)

 Beakman & Jax - Time Dilation   (Site not responding. Last check: 2007-10-18)
Time does not flow at a constant rate.
The faster one is traveling, the slower time flows.
Try changing the speed of the ship to see how that affects the dilation of time.
www.beakman.com /interact/time.html   (139 words)

 ZPi Research Labs | Geriatric Migration & Time Dilation   (Site not responding. Last check: 2007-10-18)
Time dilation is when an inertial frame experiences slowing of time relative to another inertial frame that it is moving faster than.
So, according to the concept of time dilation derived from Special Relativity, for people standing at the equator of the Earth, time will pass more slowly than for people standing at either pole.
Time dilation becomes time compression, allowing our Senior Citizen to do more with what time he or she has left, to do the things that need to get done to insure his or her legacy.
zapatopi.net /geriatric.html   (1286 words)

 Gravitational time dilation - CreationWiki   (Site not responding. Last check: 2007-10-18)
One of the affects of General Relativity is gravitational time dilation.
This is the slowing of time by a gravitational field.
Because the gravitational constant is so small, it takes a large mass with a small radius to produce significant time dilation.
creationwiki.org /index.php?title=Gravitational_time_dilation   (231 words)

 Accel-OneD Time Dilation   (Site not responding. Last check: 2007-10-18)
Even though the sound byte "time dilation" was familiar to me, and even though my intuition usually told me how to solve time dilation problems, I didn't really understand the concept until this was done.
As I looked at the diagrams I realized that in time dilation problems, one and only one inertial frame, namely the "undilated one", was accorded and deserved special status.
To pose a specific problem, imagine an inertial clock which times an interval of one year, and an inertial frame that observes the start and stop of this timing adventure from frame traveling at constant coordinate-velocity of one third of a lightyear per map year (i.e.
newton.umsl.edu /~run/dilation.html   (714 words)

 Discussions on: Flat Universe, No Space Contraction, No Time Dilation
His equations imply that "time" is another dimension similar to the coordinates X, Y and Z describing a classical volume of space.
However, the properties of time are "physically" different from the properties of space.
Mathematically, in Einstein's theory, the mathematical sign in front of the parameter "time" (squared) is not the same as for space.
www.newtonphysics.on.ca /faq/flat-universe.html   (1552 words)

 Einstein's Relativity   (Site not responding. Last check: 2007-10-18)
However light from different parts of the cube takes different times to reach the camera, so the photograph is not a record of the object at a single instant of time.
Another effect predicted by special relativity is time dilation : a clock moving at uniform speed relative to an observer would be measured to run slow, arising from the properties of space-time and not from the finite speed of light.
Although the difference in elapsed time is miniscule, the extremely high accuracy of the atomic clock has allowed the time dilation effect predicted by Special Relativity to be verified.
physics.pdx.edu /~egertonr/ph311-12/relativ.htm   (2813 words)

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