Does time exist in any objective way?

[Kezzer]

They made a black hole? Really? I find that hard to believe....

http://www.theregister.co.uk/2005/03...oles_new_york/

The idea took off in different parts of the world and scientists are in the process of creating artificial blackholes. These are tiny ones with little power to absorb anything spectacular but never the less they are blackholes created the same way a real one is created through the supernova of big stars.

http://www.indiadaily.com/editorial/4039.asp

Thanks for the condescending tone ibm. Don't tell me, now you're going to reply with something even worse just because you feel bad for being wrong

[IBM]

I think there's two types of time dilation - one is due to gravity, the other is due to velocity.

I thought they were both due to mass? The 'he ain't heavy' , rather than the 'Ahhhhhhhhhmen', kind...

[Dareos]

dunno, ever sat through Mass on Easter Sunday when the priest is off on a rant about the evils of todays society?

can be a bloody eternity i tell ya

[Whiternoise]

The LHC at CERN can possible make black holes, but they dissipate so quickly that they have basically no effect on the surroundings.

[Vroomparrot]

And if some guy called "Schrodinger" asks if he can "borrow" your cat for a little "experiment", make sure you give him short shrift and call the RSPCA.

[Tumble]

I thought the time-dilation effect around a black hole was because everything near the evet-horizon was accelerated to the speed of light due to the intense gravitational field of the thing - again, subjective and relative because it depends on where you're observing from. If you are being accelerated - things around you will appear to slow - if you are watching something being accelerated, it appears to go quicker, but whatever the situation, your frame of reference will not change - your watch will still tick at the same speed for you, but not for everyone else.

[roorooroo]

A good book to read on the subject is 'About Time' by Paul Davies if anyone's into reading.

[mike_w]

I thought the time-dilation effect around a black hole was because everything near the evet-horizon was accelerated to the speed of light due to the intense gravitational field of the thing - again, subjective and relative because it depends on where you're observing from. If you are being accelerated - things around you will appear to slow - if you are watching something being accelerated, it appears to go quicker, but whatever the situation, your frame of reference will not change - your watch will still tick at the same speed for you, but not for everyone else.

Apparently, time dilation due to special relativity i.e. due to high velocities is reciprocal:

With respect to constant relative motion between two "clocks", a measurement of relative time must choose one clock as being "stationary" in spacetime, and that clock is the basis of a temporal coordinate system where time throughout is treated as synchronized with the stationary clock. The other "moving" clock is in motion with respect to this treated-as-stationary coordinated system, and its relative motion is the velocity value used in the applicable equations.

In the Special Theory of Relativity, the moving clock is found to be ticking slow with respect to the temporal coordinate system of the stationary clock. And as indicated, this effect is symmetrical: In a coordinate system synchronized, by contrast, with the "moving" clock, it is the "stationary" clocks that is found (by all methods of measurement) to be running slow.

[MadduckUK]

the answer is NO

[Stewart]

I'll say this about time - time is brilliant.

Without time you wouldn't be able to meet people... wanna go to the pub? Yeah, what time? Time? What are you talking about? lol. Lets just both go to the pub, and if we happen to be there at the same moment, happy days!

[Dareos]

would people please stop interrupting the steady flow of drivel and derailment with actual on topic discussions about the relativity of time?

its cramping my style

[MadduckUK]

i just read your post....... can i have my 8 seconds back please? oh no it took me longer than that to write this!!!

lesson: i dont know

[herulach]

so, if time slows down within one of these black holes, then we are really occupying a tiny universe that exists for a split second in a particle accelerator somewhere.




my head hurts

Time doesnt exist inside the event horizon of a black hole, or not in any sense thats meaningful to an outside observer anyway, but we'll never know for certain (maybe) as its impossible (we think) for something to pass back out of a black hole. The tiny wee ones they make in colliders evaporate pretty quickly do to electron - positron pair production on the event horizon.

With regard to us living inside some super huge collider somewhere, I doubt it. Or, more to the point, whats the point in speculating, as you'll never be able to find out.

some stuff

If time dilation wasn't reciprocal causality wouldn't hold for bodies travelling at high speeds, and you could end up in a situation whereby an event which hasn't happened in the stationary frame affecting the moving frame.

[Steve B]

I once heard something about how if two twins existed and on boarded a space ship and traveled at the speed of light for a 4 year round trip, the twin on the space ship would have aged 4 years while the twin on earth would have aged over 30 years.

Now if this is true, this leads me to believe that time is relative/subjective and not absolute/objective, so is time applicable in any way to anything above and beyond my personal experience?

Surely the human body's process through-out the life cycle is independent of times passing.
Our definition of time is specific to our species, in that there are 24 hours in the day, not 25. Therefore, it is not possible for time to be objective, uniformly across all species. In the twins situation, the twins would still look identical after the one that was in space for 4 years, as the human body's recession to a wrinkly prune happens anyway, without regard for time. Surely?

[EvilWeevil]

And if some guy called "Schrodinger" asks if he can "borrow" your cat for a little "experiment", make sure you give him short shrift and call the RSPCA.

It's not too bad - you could just never open the box afterwards and live in the hope that the cat was still alive......you'd never know otherwise!

[bledd]

i saw on a space program before where they had 2x accurate clocks ( the f1 ones maybe ) put one on a jet that circled the earth and when it landed again, it was a good few seconds off the other one..