What is Time? If there was no light would Time cease to be?

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Offline londounkm

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Please excuse me if I am asking a stupid question, but I am trying to understand exactly what time is. When I think about time I immediately link it to light. Astronomers often tell us that they are able to take pictures of the universe billions of years in the past and that this is due to the amount of time it takes for light to travel. As I understand it, if I am looking up into the night sky what I am seeing is actually the past, in the case of the sun light I am seeing approximately 8 minutes into the past where as looking at the stars I could be looking many millions of years into the past. This is where I start to get boxed in with my own limited knowledge and perhaps some of you more knowledgeable people could enlighten me. If there was no light would time cease to exist altogether? I appreciate anyone taking the time to help me try and understand this.

Graham
« Last Edit: 20/10/2010 10:55:44 by londounkm »

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Offline Joe L. Ogan

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What is Time? If there was no light would Time cease to be?
« Reply #1 on: 20/10/2010 16:58:17 »
Time is in three parts:  Future-which never arrives and exists only in ones' imagination.  Present-which exists only for an infinitesimal split second and Past which goes on forever in ones' memory but never returns except as mistakes which we make and are inclined to repeat.  Thanks for comments.  Joe L. Ogan

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Offline Bill S

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What is Time? If there was no light would Time cease to be?
« Reply #2 on: 20/10/2010 17:57:44 »
Quote from: londounkm
Please excuse me if I am asking a stupid question, but I am trying to understand exactly what time is.

Where understanding time is concerned, I think there is no such thing as a stupid question. St Augustine shared our problem and expressed it well: "What then is time? If no one asks me, I know; if I wish to explain it to someone who asks, I know not".


There never was nothing.

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Offline raghusesha

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What is Time? If there was no light would Time cease to be?
« Reply #3 on: 20/10/2010 18:42:52 »
Here is what my limited knowledge says:
There was a similar question on sound in one of the naked scientist shows and the question was that if a tree falls in a forest and no one is around to hear the sound of tree fall, can we conclude that the tree did not make a sound while falling? Answer is obvious.
Light consists of particle traveling at a fixed speed (thanks to relativity theory).  If there is nothing happening on stars to produce light, the stars still exist in time and time does pass.
From my very little knowledge of relativity theory, speed of light is a upper bound for the velocity of any particle. Electromagnetic waves travel at this speed.  So, if none of these electromagnetic waves existed, will time exist?  My guess is yes, it will.  Only that a small set of people on a planet like ours may not be able to "see" the rest of the universe.

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Offline Soul Surfer

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What is Time? If there was no light would Time cease to be?
« Reply #4 on: 20/10/2010 19:02:44 »
A difficult question because it depends a bit precisely what the questioner means.  If you just mean would time cease to exist if you could not see anything and could only be aware of things by touching them.  groping around an drecognising things by feel requires a sense of time so clearly time exists.

However most of the interactions of which we are aware of are mediated by electromagnetic radiation and light is one particular form of electromagnetic radiation and without this no electromagnetic interactions could happen.  This would still leave other sorts of interactions notably gravity by which changes in the environment could be sensed so on the whole Time appears to be a fundamental part of the sort of universe we can understand.
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Offline Murchie85

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What is Time? If there was no light would Time cease to be?
« Reply #5 on: 21/10/2010 01:58:48 »
Personally I think time is poorly understood simply because its a man made concept and not an actual physical phenomena that can  be captured in its entirety or leave a mark on the universe.

It is relative, it is changing for different observers, it is never agreed upon by all parties and it certainly doesn't have a quantity that can be defined with universal precision (atomic clocks using cesium atoms are not the last say) and may never be.

Time can be considered as a measurement of passing events it is limited only by the measurer and time its self leaves no trace in the physical world. Its not a piece of string in which people consider a time line that can be traced backwards or forwards like a video cassette.

Time is however important, it is connected with entropy in that we know we are going forward and not backwards in time. It helps us compare certain events with other events but in terms of the light, it does not require this to exist although light does require time to exist.

Adam

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Offline Geezer

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What is Time? If there was no light would Time cease to be?
« Reply #6 on: 21/10/2010 05:32:59 »

not an actual physical phenomena that can  be captured in its entirety or leave a mark on the universe.


However, everything in the Universe is controlled by time.
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Offline Murchie85

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What is Time? If there was no light would Time cease to be?
« Reply #7 on: 21/10/2010 12:36:16 »
I disagree, time in my opinion is not a real entity, time can not control anything it does not "steer a series of events" it simply is a result we obtain from measuring the passing intervals of certain events for example.
« Last Edit: 21/10/2010 12:38:05 by Murchie85 »

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Offline Bill S

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What is Time? If there was no light would Time cease to be?
« Reply #8 on: 21/10/2010 14:32:29 »
Quote from: Murchie85
it simply is a result we obtain from measuring the passing intervals of certain events

So far I agree in general with what you have said about time, but it is interesting to see how assumptions creep in.  E.g. the assumption that "intervals of certain events" are passing, rather than that the events are stationary, and we are doing the passing.

Nit picking? Perhaps; but whole books have been written about this.
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Offline londounkm

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What is Time? If there was no light would Time cease to be?
« Reply #9 on: 21/10/2010 16:08:32 »
Firstly, thank you all very much for your thoughts and ideas it is much appreciated.

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Time is in three parts:  Future-which never arrives and exists only in ones' imagination.  Present-which exists only for an infinitesimal split second and Past which goes on forever in ones' memory but never returns except as mistakes which we make and are inclined to repeat.  Thanks for comments.  Joe L. Ogan

What a lovely and concise description of time. I read in the paper this morning that the first observed galaxy to appear out of the big bangs white soup has been imaged by Hubble and confirmed by the VLT at appx 600 million years P.B.B(Post Big Bang).

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Where understanding time is concerned, I think there is no such thing as a stupid question. St Augustine shared our problem and expressed it well: "What then is time? If no one asks me, I know; if I wish to explain it to someone who asks, I know not".

Haha brilliant, St Augustine has almost exactly described how I feel about time. Only when I really applied thought to time did I realise how little I understood it. It is certain to me that individualism and separation in society has all but destroyed the long conversations that used to take place on issues such as this. Websites like the Naked Science Forum are a blessing to those who wish to expand there understanding and knowledge of the things around them.

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A difficult question because it depends a bit precisely what the questioner means.  If you just mean would time cease to exist if you could not see anything and could only be aware of things by touching them.  groping around an drecognising things by feel requires a sense of time so clearly time exists.

However most of the interactions of which we are aware of are mediated by electromagnetic radiation and light is one particular form of electromagnetic radiation and without this no electromagnetic interactions could happen.  This would still leave other sorts of interactions notably gravity by which changes in the environment could be sensed so on the whole Time appears to be a fundamental part of the sort of universe we can understand.

In all honestly I believed that light would exist even if light did not, because as you quite rightly pointed out if the light were "turned off" in the Universe we would still be able to grope around touching and feeling. In asking the question I guess I was trying to understand the nature of time. I understand that time is not a physical thing, such as a particle but rather a measurement applied to universe by an observer. When I read that an image was taken by Hubble appx 600 millions years after the big bang, what they really mean by that is that an image was taken over a distance of X billions of miles relative to our position in space and due to the time take for the light to reach us what are seeing is actually X number of years in the past. I also understand that whether and observer is observing or not time still exists as it is simply the measurement of before, now and next.

I think I am going to stop there for now and think some more on this topic. I really appreciate all your comments and suggestions and once again would like to say thank you very much.

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Offline Bill S

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What is Time? If there was no light would Time cease to be?
« Reply #10 on: 22/10/2010 00:48:57 »
A few years ago, when I was trying to get my head round the idea of time travel, I found I was going round in circles.  My wife suggested I should write every thing down.  The following is a small extract, which might be relevant.

    One of the much discussed aspects of time is that of its apparent motion.  We talk of an arrow of time which we observe as progressing steadily from future to past, but does time actually progress in any direction.  We do not talk of an arrow of space.  We perceive space as static, and ourselves as moving through it.  Perhaps our perception of this would be different if our only experience was of being aboard a space craft, many light years away from our nearest celestial body; as we travelled steadily through empty space, for us, the only static object would be the space craft.  As long as our craft maintained a steady direction, we would, with time, observe the Universe drifting slowly past us.  Perhaps we would reason that space had a directionality of movement - an arrow of space.  The fact is that our experience, as far as space is concerned, is that we have many points of reference, the things about us which we have always regarded as static, so it is natural that we see ourselves as doing the moving.  Although we may consciously accept that these things, collectively, are in relative motion, for example, the Earth is moving round the sun, so everything on the Earth is in motion; our senses tell us that the things around us are stationary. We can see that individual objects are stationary relative to other objects.  Intuitively we know that when we move from room to room in our house, we are doing the moving, not the house.  When we get in the car and drive to town we know it is the car that is moving along the road, not the other way round.  Reason, as well as intuition, tells us that this is right,  because if it were space that was moving, our roads would have to move in many directions and at a range of different speeds at the same time in order to accommodate the observed flow of traffic.  Such is not the case with time; we have no static reference point, therefore we are able to perceive ourselves as static, and time as moving.  Relativity says that in the case of space, any point from which an observation is made has as much right as any other to be regarded as stationary.  If the same is true of time, it is natural that we would regard ourselves is stationary, and time as flowing.  This is reinforced by our perception of time flowing in exactly the same way past everyone and everything around us.  It makes equally sound sense, though, to regard time as a static entity, and to see ourselves as moving through time.  Unlike space, however, we all seem constrained to move through time in the same direction.
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Offline Geezer

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What is Time? If there was no light would Time cease to be?
« Reply #11 on: 22/10/2010 03:06:02 »
I disagree, time in my opinion is not a real entity, time can not control anything it does not "steer a series of events" it simply is a result we obtain from measuring the passing intervals of certain events for example.

You are quite entitled to your opinion of course, but time actually does control all physical and chemical processes, and it has been demonstrated repeatedly that time is not a universal constant. That means that, relative to each other, physical and chemical processes may vary depending on their particular time frames.
There ain'ta no sanity clause, and there ain'ta no centrifugal force ćther.

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Offline Bill S

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What is Time? If there was no light would Time cease to be?
« Reply #12 on: 22/10/2010 16:29:29 »
Quote from: Geezer
That means that, relative to each other, physical and chemical processes may vary depending on their particular time frames.

Could that not be interpreted a little differently?  E.g. physical and chemical processes may appear to vary, depending on the F of R from which they are observed. Time is one of the things that seems to vary. 

Let's say I drop a small piece of calcite into a solution of HCl. My clock tells me how long it takes to dissolve.  An observer who perceives me to be in motion relative to her will observe a different time for the reaction.  Does this not mean that the reaction is independent of any objective measurement of time?
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Offline imatfaal

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What is Time? If there was no light would Time cease to be?
« Reply #13 on: 22/10/2010 16:57:15 »
Bill - surely we have formulas which will allow all different frames of reference to come to the same conclusion. 

That is to say that every observer could, if he knew his own velocity relative to the chemical reaction frame, calculate the perceived reaction time of any other observer with a known relative velocity.  So the reaction time is variable - but definitely not subjective.  The practical definition of objective is that independent observers will agree, providing these observers know their velocity relative to the reaction frame of reference, they will all agree on the timing.
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Offline Bill S

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What is Time? If there was no light would Time cease to be?
« Reply #14 on: 22/10/2010 17:41:10 »
Quote from: Imatfaal
That is to say that every observer could, if he knew his own velocity relative to the chemical reaction frame, calculate the perceived reaction time of any other observer with a known relative velocity.


I have no problem with every observer being able to calculate the time in every other observer's F of R.  My point is that, according to S R, every observer has the right to consider her/his time to be as correct as any other's.  There is no objective time, unless we say that the time measured in the F of R in which the experiment is conducted is given special status.
Does S R allow that? 
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Offline imatfaal

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What is Time? If there was no light would Time cease to be?
« Reply #15 on: 22/10/2010 17:50:01 »
Not sure I agree with that - SR allows all time to be objective, none are given special status, every reference frame can be transformed to another - if we all agree on something (ie the proper time in somesuch reference frame) then surely it is objective. 
There’s no sense in being precise when you don’t even know what you’re talking about.  John Von Neumann

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Offline Geezer

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What is Time? If there was no light would Time cease to be?
« Reply #16 on: 22/10/2010 18:17:44 »
I always like to come back to the Hafele-Keating experiment because it does seem to confirm that there is no absolute time, and that processes are indeed controlled by local time (assuming I understand it correctly of course).

The multiple observers watching each other discussions (which are, I think, impossible to test anyway) always give me an 'orrible sore head  [:D]
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Offline simplified

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What is Time? If there was no light would Time cease to be?
« Reply #17 on: 23/10/2010 15:20:10 »
A mass radiates gravitation for  receiving local time. Great gravitation streams   complicate reception of local time a little. A photon does not radiate gravitation therefore does not receive local time. However unknown time operates external movement of a photon. [;)]

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Offline Bill S

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What is Time? If there was no light would Time cease to be?
« Reply #18 on: 23/10/2010 17:01:18 »
Quote from: Imatfaal
if we all agree on something (ie the proper time in somesuch reference frame) then surely it is objective.

If we all agree about the "proper time" in a given F of R, then, surely, we have also to agree on the "proper time" in all the other frames, and since these are all different, but all right, we have to conclude that time is subjective, in that it depends on the F of R.
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Offline imatfaal

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What is Time? If there was no light would Time cease to be?
« Reply #19 on: 23/10/2010 21:15:23 »
subjective
...
Formed, as in opinions, based upon subjective feelings or intuition, not upon observation or reasoning, which can be influenced by preconception; coming more from within the observer rather than from observations of the external environment..."

objective 
Of or relating to a material object, actual existence or reality.
Not influenced by the emotions or prejudices.
Based on observed facts."

As all observers will agree about proper time - and it has nothing to do with ideas and bias within the scientist but rather is based on observed facts; I would definitely say it was objective.  It may be strictly reliant on the FoR, but it doesn't depend on the opinion of the observer, it relies on a well defined fact about the observer.  Very few objective facts pop straight out from measurement - they need processing, not to massage the facts, but to bring all the different observations into a comparable form.   
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Offline Bill S

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What is Time? If there was no light would Time cease to be?
« Reply #20 on: 24/10/2010 02:40:59 »
Thanks imatfaal. I was using "subjective" in the sense of relating to the inherent nature of a person or thing, in this case the individual F of R.

Wouldn't it be great to have a language in which each word had only one meaning.
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Offline simplified

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What is Time? If there was no light would Time cease to be?
« Reply #21 on: 24/10/2010 17:22:52 »
Interesting
              http://casa.colorado.edu/~ajsh/schwp.html

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Offline imatfaal

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What is Time? If there was no light would Time cease to be?
« Reply #22 on: 25/10/2010 11:13:14 »
Bill

no it would be really boring!   [;D

And I don't like even your revised definition  [B)]  If something is inherent in an object - then it should be capable of being measured in an objective manner (though it isn't necessarily done objectively - observer might skew data to fit her pet theory: ie subjective) .  I do however know exactly the sense/meaning you are using - I just don't think subjective is the right word - and I cannot think of the right word


There’s no sense in being precise when you don’t even know what you’re talking about.  John Von Neumann

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Offline simplified

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What is Time? If there was no light would Time cease to be?
« Reply #23 on: 26/10/2010 16:36:22 »
I would like to know borders of local time in a kinematic field  [?]

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Offline imatfaal

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What is Time? If there was no light would Time cease to be?
« Reply #24 on: 26/10/2010 17:02:32 »
I am sorry simplified - I just cannot follow your arguments/quesions
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Offline king5118

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What is Time? If there was no light would Time cease to be?
« Reply #25 on: 27/10/2010 10:00:15 »
Light is a human invention and is linked to the past and future, but you are quite right in saying that it is also linked to light. If we hadn't invented time we would still rely on the sun and moon to measure our activities throughout the day and night. People get so wrapped up with time and forget that as an invention by us it can be abused and used to explain so many things. I would say that the main focus of our attention should be distance and not time. It is theoretically possible to travel faster than light and just takes someone to come up with the idea.

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Offline king5118

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What is Time? If there was no light would Time cease to be?
« Reply #26 on: 27/10/2010 10:16:32 »
If our sun didn't exist and the stars that we can see were using the light of their own galaxies then could we still say that they were in the past? Or is it relative to where we are in conjunction with them.

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Offline Bill S

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What is Time? If there was no light would Time cease to be?
« Reply #27 on: 27/10/2010 16:07:56 »
Quote from: imatfaal
no it would be really boring!

Of course it would be boring if a language in which each word had only one meaning were the only language we had, but there could be advantages to having a sort of techno-speak in which everyone could agree on definitions.   
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Offline Bill S

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What is Time? If there was no light would Time cease to be?
« Reply #28 on: 27/10/2010 16:13:40 »
Quote from: King5118
It is theoretically possible to travel faster than light and just takes someone to come up with the idea.

Relativity does not preclude travelling at superluminal speed.  My understanding is that serious problems arise if you try to accelerate from sub- to super-luminal speed.  are you saying that that is theoretically possible?
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Offline Bill S

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What is Time? If there was no light would Time cease to be?
« Reply #29 on: 27/10/2010 16:26:38 »
Quote from: King5118
If our sun didn't exist and the stars that we can see were using the light of their own galaxies then could we still say that they were in the past? Or is it relative to where we are in conjunction with them.

I'm not sure that I follow this.  What difference would the absence of our sun make to the scenario?
The fact that we see distant stars, galaxies etc. as they were in the past is due to the length of time their light takes to reach us.  This even applies to our sun; we see it as it was about 8 mins ago.
Could it be that we create some of our own problems by thinking of time as "flowing"?  It might be simpler (some hopes  [;D])to think of time as static, and ourselves as travelling through it.
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Offline simplified

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What is Time? If there was no light would Time cease to be?
« Reply #30 on: 28/10/2010 14:42:32 »
Moving cannot be without time.

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Offline Ron Hughes

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What is Time? If there was no light would Time cease to be?
« Reply #31 on: 28/10/2010 15:25:36 »
Suppose that the Universe consisted of only a single electron, would time exist? The quick answer would be no because nothing is moving with respect to anything else.That is not entirely true and I will explain if anyone asks. Now suppose we insert another electron, that is in motion WRT the other electron, into the Universe. Now there are two electric fields in our hypothetical Universe and they are changing with WRT each other. Time is any change WRT something else.
From a drop of water a logician could infer the possibility of an Atlantic or a Niagara without having seen or heard of one or the other. Sherlock Holmes.

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Offline Bill S

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What is Time? If there was no light would Time cease to be?
« Reply #32 on: 28/10/2010 23:23:00 »
Quote from: Ron Hughes
Suppose that the Universe consisted of only a single electron, would time exist? The quick answer would be no because nothing is moving with respect to anything else.That is not entirely true and I will explain if anyone asks.

Explanation, please.
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Offline CPT ArkAngel

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What is Time? If there was no light would Time cease to be?
« Reply #33 on: 29/10/2010 03:00:14 »
The event horizon of a particle or a black hole is defining the 0 timerate of it. Gravity around it defines the local timerate. According to photon Theory, there is a point in the middle (not really a singularity but due to symmetry of the gravitational field) where the timerate is 0. This point will move according to interference with the event horizon from outside fields.

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Offline Ron Hughes

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What is Time? If there was no light would Time cease to be?
« Reply #34 on: 29/10/2010 03:13:29 »
(Play like) you were an entity capable of creating space/time and the matter that makes our Universe. Instead you create only a single electron which would include it's electric field. At the instant you create it that electric field would start expanding at C, This expanding field would obey the inverse square law which would mean that time and space started at the instant the electron was created.
« Last Edit: 29/10/2010 15:44:51 by Ron Hughes »
From a drop of water a logician could infer the possibility of an Atlantic or a Niagara without having seen or heard of one or the other. Sherlock Holmes.

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Offline Bill S

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What is Time? If there was no light would Time cease to be?
« Reply #35 on: 29/10/2010 22:10:28 »
Thanks R H.  Just to make sure we are not running into Mark McCutcheon's expanding electrons [:o)], it is only the electric field that expands?
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Offline Ron Hughes

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What is Time? If there was no light would Time cease to be?
« Reply #36 on: 29/10/2010 23:25:04 »
Yes the field is what expands. If you somehow move the electron that will create a photon. You could ask, move it with respect to what? The answer is move it with respect to the expanding field that started from it's original position.
« Last Edit: 29/10/2010 23:28:41 by Ron Hughes »
From a drop of water a logician could infer the possibility of an Atlantic or a Niagara without having seen or heard of one or the other. Sherlock Holmes.

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Offline Bill S

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What is Time? If there was no light would Time cease to be?
« Reply #37 on: 30/10/2010 17:02:01 »
Quote from: R H
If you somehow move the electron that will create a photon.

Is that because you would have to hit the electron with something to move it, and the collision would "create a photon"? 
Would it matter what you used to hit the electron?
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Offline Ron Hughes

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« Last Edit: 30/10/2010 17:30:56 by Ron Hughes »
From a drop of water a logician could infer the possibility of an Atlantic or a Niagara without having seen or heard of one or the other. Sherlock Holmes.

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Offline simplified

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What is Time? If there was no light would Time cease to be?
« Reply #39 on: 18/01/2011 16:19:14 »
Propagation of my time definition:
   "Time is quantity of motion"  [;)]

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Offline QuantumClue

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What is Time? If there was no light would Time cease to be?
« Reply #40 on: 18/01/2011 21:28:15 »
Time is in three parts:  Future-which never arrives and exists only in ones' imagination.  Present-which exists only for an infinitesimal split second and Past which goes on forever in ones' memory but never returns except as mistakes which we make and are inclined to repeat.  Thanks for comments.  Joe L. Ogan

This is wrong. Time does not have a description of past, present and future. These objects do not exist within relativity and quantum theory.

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Offline QuantumClue

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What is Time? If there was no light would Time cease to be?
« Reply #41 on: 18/01/2011 21:31:54 »
Propagation of my time definition:
   "Time is quantity of motion"  [;)]

This is also wrong. This is a Newtonian definition of time. Time does not equal motion.

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Offline QuantumClue

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What is Time? If there was no light would Time cease to be?
« Reply #42 on: 18/01/2011 21:33:05 »
Moving cannot be without time.

Since time is quantized in quantum mechanics, and since time has no flow in relativity, this is not true.

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Offline Geezer

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What is Time? If there was no light would Time cease to be?
« Reply #43 on: 18/01/2011 21:46:58 »
Propagation of my time definition:
   "Time is quantity of motion"  [;)]

This is also wrong. This is a Newtonian definition of time. Time does not equal motion.

Time is measured in terms of motion. Just because it's Newtonian, it does not mean it's "wrong".

Also, unless you are only trying to start an argument, if you believe something is wrong, it would be nice if you provided an explanation for why you think it's wrong.

Can you explain how you are able to measure time without motion?
There ain'ta no sanity clause, and there ain'ta no centrifugal force ćther.

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Offline QuantumClue

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What is Time? If there was no light would Time cease to be?
« Reply #44 on: 18/01/2011 21:50:58 »
Suppose that the Universe consisted of only a single electron, would time exist? The quick answer would be no because nothing is moving with respect to anything else.That is not entirely true and I will explain if anyone asks. Now suppose we insert another electron, that is in motion WRT the other electron, into the Universe. Now there are two electric fields in our hypothetical Universe and they are changing with WRT each other. Time is any change WRT something else.

This is probably the best explanation I've heard so far. However, just because we have more than one moving object in our universe does not mean that clocks necesserily tick.

Explaining why is a little harder to explain. Time evolution, like you would find in the Schrodinger equation (you could even look at the writeup recently which has a small part on the evolution equation) is a type of diffeomorphism. Time constraints in a classical Hamiltonian will eventually find the Schrodinger Equation effectively having no time description.

This is called the Wheeler de Witt equation, and its at the heart of quantum theory and General Relativity.
« Last Edit: 18/01/2011 21:52:29 by QuantumClue »

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Offline QuantumClue

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What is Time? If there was no light would Time cease to be?
« Reply #45 on: 18/01/2011 21:52:09 »
Propagation of my time definition:
   "Time is quantity of motion"  [;)]

This is also wrong. This is a Newtonian definition of time. Time does not equal motion.

Time is measured in terms of motion. Just because it's Newtonian, it does not mean it's "wrong".

Also, unless you are only trying to start an argument, if you believe something is wrong, it would be nice if you provided an explanation for why you think it's wrong.

Can you explain how you are able to measure time without motion?

Oh it is wrong. Motion does not equate to time. In general relativity motion ceases to exist, we have what are called pure gravity models. If the universe was an object, internal energies ceases to move due to the Wheeler de Witt equation.

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Offline Geezer

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What is Time? If there was no light would Time cease to be?
« Reply #46 on: 18/01/2011 22:17:35 »
Propagation of my time definition:
   "Time is quantity of motion"  [;)]

This is also wrong. This is a Newtonian definition of time. Time does not equal motion.

Time is measured in terms of motion. Just because it's Newtonian, it does not mean it's "wrong".

Also, unless you are only trying to start an argument, if you believe something is wrong, it would be nice if you provided an explanation for why you think it's wrong.

Can you explain how you are able to measure time without motion?

Oh it is wrong. Motion does not equate to time. In general relativity motion ceases to exist, we have what are called pure gravity models. If the universe was an object, internal energies ceases to move due to the Wheeler de Witt equation.

That does not answer my question. How do you measure time?
There ain'ta no sanity clause, and there ain'ta no centrifugal force ćther.

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Offline QuantumClue

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What is Time? If there was no light would Time cease to be?
« Reply #47 on: 18/01/2011 22:30:23 »
Propagation of my time definition:
   "Time is quantity of motion"  [;)]

This is also wrong. This is a Newtonian definition of time. Time does not equal motion.

Time is measured in terms of motion. Just because it's Newtonian, it does not mean it's "wrong".

Also, unless you are only trying to start an argument, if you believe something is wrong, it would be nice if you provided an explanation for why you think it's wrong.

Can you explain how you are able to measure time without motion?

Oh it is wrong. Motion does not equate to time. In general relativity motion ceases to exist, we have what are called pure gravity models. If the universe was an object, internal energies ceases to move due to the Wheeler de Witt equation.

That does not answer my question. How do you measure time?

We are not sure you can in General Relativity. Matter fields vanish, and what is left is an energy field which does not change at all.

In quantum theory, it looks like an approach to this is to measure motion as static frames of tiny little moments called the Planck Time. In theory, time does not have flow, but is a succession of tiny beginnings and ends, each existing for the smallest frame of time possible, and so does not contain a motion as such, not a continuous one any way.

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Offline Geezer

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What is Time? If there was no light would Time cease to be?
« Reply #48 on: 18/01/2011 22:32:29 »
Propagation of my time definition:
   "Time is quantity of motion"  [;)]

This is also wrong. This is a Newtonian definition of time. Time does not equal motion.

Time is measured in terms of motion. Just because it's Newtonian, it does not mean it's "wrong".

Also, unless you are only trying to start an argument, if you believe something is wrong, it would be nice if you provided an explanation for why you think it's wrong.

Can you explain how you are able to measure time without motion?

Oh it is wrong. Motion does not equate to time. In general relativity motion ceases to exist, we have what are called pure gravity models. If the universe was an object, internal energies ceases to move due to the Wheeler de Witt equation.

That does not answer my question. How do you measure time?

We are not sure you can in General Relativity. Matter fields vanish, and what is left is an energy field which does not change at all.

In quantum theory, it looks like an approach to this is to measure motion as static frames of tiny little moments called the Planck Time. In theory, time does not have flow, but is a succession of tiny beginnings and ends, each existing for the smallest frame of time possible, and so does not contain a motion as such, not a continuous one any way.

Yes, but how do you measure time without motion?
There ain'ta no sanity clause, and there ain'ta no centrifugal force ćther.

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Offline QuantumClue

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What is Time? If there was no light would Time cease to be?
« Reply #49 on: 18/01/2011 22:36:46 »
That's the stubborn illusion of reality Einstein often talked about. Past and future seem to be stubbornly persistent illusions - motion is measured with our equations, but the truth and crux of the matter is that a unified approach will not use the classical postulations of equations of motion. They will adhere to support the framework of relativity.