Are we ever in the present time?

  • Thread starter JD
  • Start date
  • Tags
    Time
In summary: I do occurs instantaneously in the present moment it happens in. Just because I may process it ever so slightly later doesn't mean it didn't happen in the present when I did it. It is just now a different present than the present when I typed the first letter of this...
  • #36
"Now" is the succession of moments demarcating "existence". Only the now exists. The past no longer exists and the future has not yet been created. Existence is the now. Time is the observance of change in existence. Your present "now", your observance of change, is relative. Reality is comprised of a multitude of relative nows. The physicality of "existence" reguires relativity in individual nows. My now is unique in the local I find myself.

Time is not consistent. because the rate of change can vary from observer to observer.
 
Physics news on Phys.org
  • #37
I'm not trying to be negative or anything, but I'm curious as to why it matters?
 
  • #38
One event marks consciousness in the present; events lying on its corresponding Minkowski cone surface are also at present. All other entities reside in the relative present and future.
 
  • #39
Tigron-X said:
I'm not trying to be negative or anything, but I'm curious as to why it matters?
Entertainment :biggrin:

Nice one royce!

-Ruler of the Universe,
Smurf
 
  • #40
"We perceive things slightly after the point at which they have occured.
Is there any such thing as the present time, or is what we call the present time actually always slightly in the past?
In other words, does 'now' actually exist?"


Well... Its a hard concept to grasp, that we are never really existing in the present... hmmm... but i understand this concept, and feel its true...

However, not all beings live in the lag that we do... A dogs heartbeat is faster than ours, and its system moves faster as a whole... The images it sees are processed far quicker than ours and thus what a dog sees is closer to the present (which is, in my definition, the time at which something actually happens) than what we see. Then, take a fly. Its heart beat and system is many times faster, i think 100x faster or somethink like that, and its said by biologists that there is NO lag between what it sees and what actually happens...

So yeah, some things do see the present... Its just us...
 
  • #41
Magg$ said:
So yeah, some things do see the present... Its just us...

It's theoretically impossible for anything to live 'in the present' in the sense it's being used here. Consider that all living things require must receive and process physical signals from their environment in order to know anything about their environment, and as this process has an absolute speed limit (the speed of light, c), it necessarily takes a non-zero amount of time to occur.

Even neglecting the time needed for an animal to cognitively process a visual signal, the visual stimulus itself, originating (say) x meters away from the animal, must take at least x/c seconds to arrive at the animal's eye. Including some cognitive processing time t, the animal necessarily sees the object as it was x/c + t seconds ago.
 
  • #42
You will know it when it happens and not until. Jesus Albert Happy the clown or anyone else will not be able to take if from you or convince you of anything else. Your experience will be beyond convinced. You will have crossed over into a place where there is no turning back.
 
  • #43
JD said:
I'm not certain that this is the correct area within which to post this thread but here goes.

We perceive things slightly after the point at which they have occured.
Is there any such thing as the present time, or is what we call the present time actually always slightly in the past?
In other words, does 'now' actually exist?

The only way to be in the 'REAL PRESENT' is to violate Einstein's UNIVERSAL CONSTANT in a new mathematics derived from the 'STANDARD UNIVERSAL NOW' (SUN). Well, this is physically ruled out within the Physics community...so they belief. The priniciple of the SUN forces a PRIME MOVER or a 'SUPERSTRUCTURED ENTITY' to think and act in a manner which at least in principle violates Einstein's universal constant. SUN is simply a 'SUPERCRITICAL NOW' that if attained, even in principle, reduces space itself (regardless of its size) into a 'SUPERCRITCAL HERE'. In this state, the Prime Mover could be said to be GENUINELY in the pressent. Oherwise, your doubts about the notion of the present remains.
 
  • #44
JD said:
I'm not certain that this is the correct area within which to post this thread but here goes.

We perceive things slightly after the point at which they have occured.
Is there any such thing as the present time, or is what we call the present time actually always slightly in the past?
In other words, does 'now' actually exist?

I think we live in relative “now”, point of touch is “now”, then point of perception for that touch is “now”, the delay is constant so symphony plays without a jerky motion and thus now is now.
 
Last edited:
  • #45
There is research that shows our brain begins to respond to an event about half a second before we become aware of it.
 
  • #46
Until we have a grand unified theory of all the forces of nature,
we will not know if our preferred description of time - relativity theory - is
the right description.And this is part of the problem of asking if
something happens "now."
 
  • #47
Rothiemurchus said:
Until we have a grand unified theory of all the forces of nature,
we will not know if our preferred description of time - relativity theory - is
the right description.And this is part of the problem of asking if
something happens "now."

While current physical theories aren't the final word on the nature of reality, we have to have some confidence that they are heading in the right direction. Newtonian mechanics wasn't overthrown; it was demonstrated to be a special case. Likewise, any further refinement on our notion of time and space is not likely to overthrow relativity, but to place it in a wider context. That is, our understanding of time will not be crumpled up and thrown in the trash can, but rather refined, edited, fine-tuned. And for mid-level organisms existing in relatively banal physical circumstances such as ourselves (let alone any arbitrary physical system), instantaneous information transfer would indeed require a complete rewrite of the rules, contradicting everything we know about physical reality, including what has been experimentally confirmed to many, many decimal places. Something like that is just not going to happen, no matter what form the prospective GUT could take.
 
  • #48
Hypnagogue:
Special relativity does not preclude all actions of the universe occurring at the same time. In fact AE used simultaneous occurring light signals to demonstrate relativity. If you deny simultaneity then you must invalidate SR.
 
  • #49
4Newton said:
Hypnagogue:
Special relativity does not preclude all actions of the universe occurring at the same time. In fact AE used simultaneous occurring light signals to demonstrate relativity. If you deny simultaneity then you must invalidate SR.

Einstein noted that what was simultaneous to one observer was not to other observers. THAT is the essence of relativity; it's called relativity of simultaneity, and it means that being simultaneous is a frame dependent thing like length and time flow. There is no absolute simultaneity.
 
  • #50
Hi selfAdjoint:
Einstein noted that what was simultaneous to one observer was not to other observers. THAT is the essence of relativity; it's called relativity of simultaneity, and it means that being simultaneous is a frame dependent thing like length and time flow. There is no absolute simultaneity.

Observation has nothing to do with simultaneity. Einstein states in his mind experiment that two flashes of light are simultaneous if the light from the two sources reaches the observer at the same time. According to your interpretation of SR if I as an observer move two feet toward or away from the either source they are no longer simultaneous. No longer flash at the same time. If that is so then you must explain how my movement moved their time frame.
 
  • #51
4Newton said:
Observation has nothing to do with simultaneity.

Sure it does, insofar as observations may or may not be simultaneous.

Einstein states in his mind experiment that two flashes of light are simultaneous if the light from the two sources reaches the observer at the same time.

You need to be more specific. The idea is that the detection of the pulses is simultaneous if the light from two sources reaches the observer at the same time. The simultaneity of the emission is a different matter altogether.

According to your interpretation of SR if I as an observer move two feet toward or away from the either source they are no longer simultaneous. No longer flash at the same time.

Nope. You're confusing the emission and the detection, which are two distinct events.
 
  • #52
Hello Tom Mattson:
In keeping with the topic of the thread. “Are we ever in the present time?” we need to understand the idea of present time, NOW.
All actions in our universe must occur at some point of time. I think that everyone will agree that the point of time that the smallest detectable action takes place is NOW, or present time.

The statement I made
Originally Posted by 4Newton
Observation has nothing to do with simultaneity.
is in reference to this topic and applies to actions and not observations. An action taking place in the present time, Now, is not dependent on any observation. Observation always comes after the action (limit of the speed of light) and can not affect the action.

Extending the question of Now, the present time, to a general understanding. The question becomes “is Now local or global”.

If Now is global then Now is the same everywhere in the universe and all things occur simultaneously everywhere in the universe.

I used Einstein’s experiment, which is accepted by almost everyone, to provide the definition for simultaneity.

Quote 4Newton
Einstein states in his mind experiment that two flashes of light are simultaneous if the light from the two sources reaches the observer at the same time.
Quote Tom Mattson
You need to be more specific. The idea is that the detection of the pulses is simultaneous if the light from two sources reaches the observer at the same time. The simultaneity of the emission is a different matter altogether.
My statement was in reference to the experiment of Einstein. Einstein was very specific about the light sources being simultaneous. I thought it was sufficient to refer to His thought experiment without repeating the details of His conditions.

Quote 4Newton
According to your interpretation of SR if I as an observer move two feet toward or away from the either source they are no longer simultaneous. No longer flash at the same time.
Quote Tom Mattson
Nope. You're confusing the emission and the detection, which are two distinct events.
That was the whole point of that statement. This statement is meant to show as stated at the beginning of this post that emission or the simultaneity of the emission has nothing to do with observation or detection.

If you accept Einstein’s idea then all points equal distant from an observer have actions that occur at the same time, or are points of Now, and whenever you move your position all points equal distant from you are again Now points. Therefore all possible points must be Now and all actions are in the present, Now, throughout the universe.
 
  • #53
I believe our concept of time may not be correct . I believe the past, future and present may be one, occurring at the same time or THE time. The more future there is, the more past there is vice versa. If you were to watch a video in reverse, would you not say there is a pattern there also? Imagine if we could only view our world in reverse, where coming into being were things such as flowers turning into seedlings or lakes that slowly drive back into the sea through rivers. The laws of physics we believe in today I imagine would just be reversed or maybe even a new form of physics completely. But there must be a physics to it as there is a continuous flowing pattern to be seen. So then what are we? What is it we experience? We may be the only real “time” that exists, the present. The area of existence that lies right after the past and right before the future. We experience the future and the past simultaneously. The present is neither moving foward nor backwards, it is at a stand still. What we are experiencing as movement is much like photographs in motion, yet there is no way to know which direction this motion is taking or if it is even taking any direction at all! This convergence of future and past may even be reason to why we are conscious, so that we are able to see and react to the past and the future. what we have done in the past effects our future, what is being done in the future, effects our past. We are merely the experience of it all, which then brings up question, do we have free will?
Ability to see the past has been mastered.
"Psychics" ability to see the future, evolution.
 
Last edited:

Similar threads

Replies
8
Views
473
  • General Discussion
Replies
12
Views
1K
  • General Discussion
Replies
5
Views
711
  • Special and General Relativity
Replies
27
Views
2K
  • General Discussion
Replies
12
Views
2K
  • General Discussion
Replies
3
Views
610
  • Special and General Relativity
2
Replies
58
Views
3K
  • Other Physics Topics
Replies
8
Views
1K
Replies
5
Views
825
  • Special and General Relativity
Replies
21
Views
998
Back
Top