What Are the Limitations and Possibilities of Measuring Time?

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SUMMARY

The discussion centers on the measurement of time, specifically the concept of Planck time, which is derived from the Planck length and the speed of light. Participants debate whether the Planck length represents the shortest possible length and, by extension, if Planck time is the shortest measurable time. The conversation also touches on the nature of time, with some arguing that time is a human construct while others assert that it exists independently of human perception. The lack of a definitive theory of quantum gravity complicates the understanding of time's quantization.

PREREQUISITES
  • Understanding of Planck units, including Planck length and Planck time.
  • Basic knowledge of special relativity and its implications on time measurement.
  • Familiarity with quantum mechanics concepts, particularly quantization of energy.
  • Awareness of the ongoing debates in theoretical physics regarding quantum gravity.
NEXT STEPS
  • Research the implications of Planck units in modern physics.
  • Study the principles of special relativity and their effects on time perception.
  • Explore the current theories surrounding quantum gravity and their challenges.
  • Investigate the philosophical implications of time as a construct versus an independent entity.
USEFUL FOR

Students of physics, theoretical physicists, and anyone interested in the foundational concepts of time measurement and its philosophical implications.

  • #61
BrettJimison said:
That's not what I'm saying. I'm saying that when man arrived (whenever we did) we saw repetition as a way of keeping track of events. When did I say that repetition didn't exist before man started counting it? That's obviously nonsense!
I agree it is obviously nonsense. So I always have a hard time understanding why people like yourself make such obviously nonsensical statements.

If you have some repetitive physical phenomenon then each different repetition must differ in some physical quantity. That physical quantity exists regardless of man or how man might measure or label or describe it. The fact that man made a label ("time") and a device to measure it (clocks) and applied those man made labels and devices to that physical quantity does not mean that man made the physical quantity itself.
 
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  • #62
Meselwulf said:
What is the simplest vibration of energy? What makes temperatures? Can a system be a simple vibration?
Energy cannot vibrate. A system cannot be a vibration.

This is the most egregious case of a wikipedia education gone wrong that I have seen.
 
  • #63
An oscillator is synonymous to something vibrating - in fact, string theory deals with such cases where particles are simply vibrations of tiny particles we call strings.

This is physics 101.
 
  • #64
DaleSpam said:
If time may have existed before man then obviously time cannot be man made.

Duh.

They key word was ''If'' time existed before man. You don't need to state the obvious because nothing intelligible is being made of these.. discussions.

It goes deeper than that. Time may not exist before man because time is not an objective phenomena. However, there is plenty evidence to support the idea that time is subjective, man-made call it what you will, even biological explanations, who, another posters hear wouldn't even want to listen to ... and had the audacity to call me a lunatic.
 
  • #65
Jorriss said:
Energy cannot vibrate. A system cannot be a vibration.

This is the most egregious case of a wikipedia education gone wrong that I have seen.

Well you'd be wrong then, because what is an oscillator?
 
  • #66
time is not quantized because it is not an operator and therefore is not a dynamical variable.
 
  • #67
Meselwulf said:
An oscillator is synonymous to something vibrating - in fact, string theory deals with such cases where particles are simply vibrations of tiny particles we call strings.

This is physics 101.

...ok? Is there a reason you posted this?

Meselwulf said:
Duh.

They key word was ''If'' time existed before man. You don't need to state the obvious because nothing intelligible is being made of these.. discussions.

It goes deeper than that. Time may not exist before man because time is not an objective phenomena. However, there is plenty evidence to support the idea that time is subjective, man-made call it what you will, even biological explanations, who, another posters hear wouldn't even want to listen to ... and had the audacity to call me a lunatic.

For the second time, we are not discussing the subjective experience of passing time. We are discussing the physical property, the dimension, whatever you want to call it. The two concepts require completely different discussions, and we would make more of a mess out of this thread than it already is if we don't stick to one.

Meselwulf said:
Well you'd be wrong then, because what is an oscillator?

According to your earlier post, its a vibration. Which is only partly correct. And I don't see how Joriss is wrong. Energy cannot vibrate and a vibration in and of itself cannot be a system.
 
  • #68
chill_factor said:
time is not quantized because it is not an operator and therefore is not a dynamical variable.

In my opinion, you can't quantize which most likely doesn't exist, period.
 
  • #69
Drakkith said:
...ok? Is there a reason you posted this?



For the second time, we are not discussing the subjective experience of passing time. We are discussing the physical property, the dimension, whatever you want to call it. The two concepts require completely different discussions, and we would make more of a mess out of this thread than it already is if we don't stick to one.



According to your earlier post, its a vibration. Which is only partly correct. And I don't see how Joriss is wrong. Energy cannot vibrate and a vibration in and of itself cannot be a system.


Time is not physical.
 
  • #70
In the words of Julian Barbour...

''There is only change, there is no time.''
 
  • #71
Meselwulf, I'm reporting you and requesting that this thread be locked. You are obviously not here to do anything but argue with people and push your own opinion without attempting to understand anything.
 
  • #72
Of course energy can vibrate... this is common sense. And yes, energy is a system.
 
  • #73
Drakkith said:
Meselwulf, I'm reporting you and requesting that this thread be locked. You are obviously not here to do anything but argue with people and push your own opinion without attempting to understand anything.

Wrong, I have answered you in the best I can, it was you last night trying to cause the arguments.
 
  • #74
Meselwulf said:
Of course energy can vibrate... this is common sense. And yes, energy is a system.

Support your statement please. How can energy vibrate? What specifically is vibrating?
 
  • #75
Drakkith said:
Meselwulf, I'm reporting you and requesting that this thread be locked. You are obviously not here to do anything but argue with people and push your own opinion without attempting to understand anything.

I no... I am not ''pushing my opinion'' I am pushing the quantum physics. The physics I speak of is real and existing. I don't push any opinion.
 
  • #76
Drakkith said:
Support your statement please. How can energy vibrate? What specifically is vibrating?

What is a quantum harmonic oscillator... does an oscillator not vibrate?
 
  • #77
Meselwulf said:
What is a quantum harmonic oscillator... does an oscillator not vibrate?

It is a particle, or a system of particles. Not energy.
 
  • #78
Drakkith said:
It is a particle, or a system of particles. Not energy.

A Harmonic oscillator is a unit of energy. A unit can be a system in it's own right.
 
  • #79
Meselwulf said:
A Harmonic oscillator is a unit of energy. A unit can be a system in it's own right.

Explain how a "unit of energy" can oscillate. What is oscillating?
 
  • #80
Just define ''oscillation''... when you have you will see it is by definition a system which vibrates.
 
  • #81
Meselwulf said:
Just define ''oscillation''... when you have you will see it is by definition a system which vibrates.

Answer the question or get off the forums. What is oscillating when you claim that energy can oscillate?
 
  • #82
Thread locked pending moderation.
 

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