Re: what is time?
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Re: what is time?
time is the 'price' of the 'value' of life.
Re: what is time?
first thigns first, Black holes arent holes, but supermassive degenerated matter.
There are several theories that time changes near, at and after the event horison. I think only the method of recording time will change. This because electromagnetic radiation is used for communication. the actual time is the the same through out the universe regardless of position. It can never be changed or altered by any mass.
It is the intense gravity inducing matter which does this.
Jony: again, I m pretty sure time does not stop at the event horizon at all. Only measurements made by observers far away from the EH will tell the passage of time has stopped. This because light emitted by the objects loses energy moving away from the EH. The light is red-shifted too, so only vague infrared images wll be visable.
Re: what is time?
Dutch bhai i disagree to the major argument u have presented. First, the light is red shifted only bcos the universe is expending, if it was contracting it would have been a blue shifted. Second no matter how much energy light loses the speed of light remains the same.
In the high velocities the apparatus to measure time works just fine but there r still proven difference, through atomic clocks. This proves it is actually the time that slows down and not the faulty machines. & that is exactly why i think time is directly relative to the speed of light & hence it is time.
Re: what is time?
What is time ... ah but a irreversable number.
Re: what is time?
I know the the theory of the pulsating universe. But I am (we all are 
) talking about light moving away from a massive body such as a heavy star or blackhole. This effect is called a gravitational redshift, also known as the Einstein effect.
Light coming from a region of weaker gravity shows a gravitional blueshift. I didnt say anything about light losing its speed 
I did read one article concerning measurements with atomic clocks (pound-rebka experiment) but didnt read much further into it . So I cant give any comments on the last part
Re: what is time?
This topic is inspired by a topic in kids corner (cafe). I didn't feel like starting this discussion there. so here it is.
We think that time (or our perception of time) alters with an increase in velocity relative to the speed of light. So time is relative to the observer and is not a constant.
The fact you have to put so much energy into a system to alter the relative aspect of time would seem to imply that time does indeed have an energy, or at least an inertia.
The mass/time relationship is interesting. Does the enormous mass of a black hole actually alter time, or is it the intense gravity inducing matter to relativistic speeds which does this? If gravity is an aspect of mass then I suppose you could say the former. If time is only an aspect of perception however, the mass would not alter time but your perception of time would alter when in the influence of that mass.
Peace Xenophanez
Black holes can actually exist with only three times the mass of our sun, if I remember correctly. Therefore I would tend to argue that the acceleration tending towards the centre of the black holes determine the time shift.
I think space should be viewed as a fabric. Therefore the mass of an object would alter the space-time 'bending' it. Black holes on the other hand, would seem to be much less massive for the effects they exhibit. I would therefore say in their case it would seem that they have actually created a 'tear' in the fabric of space.
I also believe that time is a created entity. Coming in to existence when creation began. It needs to be inherently linked mass and energy. I also do not think that time has an energy, rather that time-space-energy are a continuum, matter being the latent form of energy.
I think you have a somewhat valid point when you mention that time may be just an aspect of perception. Perhaps this can be elaborated slightly. To call up the relativistic model of time. That there are layers of 'perceived' time each which are true within their own parameters, but nested within other layers could affect the overall 'perception' ... for example this idea suggests that it is possible to live a lifetime in a moment.
Peace again ... good question.
Re: what is time?
Very Interesting question
Time is Delta of Event. What I mean is that Time passes only if there is some event.
In a blackhole there is no Delta Event, and so the time stops there.
I think that explains when we have nothing to do and not much is happening in our lives, time deosn't seem to pass. A day feels like a year.
Re: what is time?
Very Interesting question
Time is Delta of Event. What I mean is that Time passes only if there is some event. In a blackhole there is no Delta Event, and so the time stops there.
I think that explains when we have nothing to do and not much is happening in our lives, time deosn't seem to pass. A day feels like a year.
Interesting take...
Re: what is time?
shame fullness is time, for the one who leaves things unsaid.
assertiveness and patience is time, for the one who stay stead fast.
Re: what is time?
recently I had a related discussion with someone about time and we concluded that the concept of time (and everything flowing from that, such as cause-effect reasoning, abstract thinking etc) is the key feature that distinguishes humans from animals. 
do note: that the ‘concept’ of day-night etc animals react to is more instinctive than the concept/feeling of time we humans have