''TIME'' - definitions

Discussions on the philosophical foundations, assumptions, and implications of science, including the natural sciences.

''TIME'' - definitions

Postby socrat44 on January 16th, 2019, 2:16 am 

''TIME'' - definitions
==
Can ''Time'' exist without matter ?
No.
Therefore, the right definition of ''time'' is to say: ''Gravity-time''
We have Earth ''gravity-time''.
Another planets have their own ''gravity-time''
From ''gravity-time'' is possible to create another definitions of ''time''
( atomic time-clock , biological-time, local-time, psychological-time . . . . )
=====
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Re: ''TIME'' - definitions

Postby bangstrom on January 16th, 2019, 2:54 am 

Gravity is curved spacetime so time is one half of gravity. The other half is space. Space keeps everything from happening in the same place and time keeps everything from happening at once. I don’t know of any better definition for space and time.
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Re: ''TIME'' - definitions

Postby nicolle38 on February 10th, 2019, 1:41 pm 

[quote="socrat44 » January 15th, 2019, 11:16 pm"]''TIME'' - definitions
==
Can ''Time'' exist without matter ?
No."

Can Time exist? No. In my opinion, it is merely a concept....albeit a useful concept. Time, love, the Easter Bunny are all useful concepts that do not, in and of themselves, exist. There is no "river of time" except in our imaginations. There is only the Universal Now.

Experiments that attempt to show "time" effecting matter in some way all come back to the same problem....the timepieces. Because clocks (even atomic clocks) CAN be effected by outside influences (like gravity) but time itself can not. Concepts do not respond to gravity. There is no universal timepiece ticking away somewhere in the universe. There is only different concepts of "time". And concepts don't effect matter.
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Re: ''TIME'' - definitions

Postby Serpent on February 10th, 2019, 1:47 pm 

nicolle38 » February 10th, 2019, 12:41 pm wrote:Can Time exist? No. In my opinion, it is merely a concept....albeit a useful concept.

Just so!
It's a way to describe change. All measures of time are a function of matter and its rate of change.
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Re: ''TIME'' - definitions

Postby Lozza on April 1st, 2019, 3:40 am 

Time....an elaborate hoax developed by the Swiss in order to sell cuckoo clocks.

Sorry, I couldn't resist sharing the joke.

I agree with those that have stated that it's a concept we have developed in order to measure change. Is time relevant to the universe? We can't know, but I sincerely doubt it. We humans have made it relevant and have made it a useful tool for our purposes, but does it go beyond that? I kinda doubt it.
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Re: ''TIME'' - definitions

Postby socrat44 on April 1st, 2019, 6:29 am 

Time is rate of change.
Time is measure of change.
#
We live in constant artificial Earth gravity-time.
This Earth gravity-time for us is an absolute time.
In this constant Earth gravity-time we can see
many individual changes that can be measured
by artificial (second, hour,day, month, year) time.
This kind of time is also absolute for us:
Julius Caesar was assassinated on March 15, 44 BC
Max Planck died on October 4, 1947
====
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Re: ''TIME'' - definitions

Postby bangstrom on April 2nd, 2019, 12:59 am 

Einstein wrote a letter to Michele Besso’s family at the time of Besso’s death and about a month before his own. "Now he has departed from this strange world a little ahead of me. That signifies nothing. For those of us who believe in physics, the distinction between past, present and future is only a stubbornly persistent illusion."

Here are two more quotes about time:

Eddington (1920): “Events do not happen: they are just there, and we come across them... [as] . . . the observer on his voyage of exploration.”

Hermann Weyl (1922): “The objective world simply is, it does not happen. Only to the gaze of my consciousness crawling upward along the life-line of my body does a section of this world come to life as a fleeting image.”
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Re: ''TIME'' - definitions

Postby socrat44 on April 2nd, 2019, 6:54 am 

@ bangstrom
There are many-many quotes and opinions about ''time''
#
The biblical accounts of the creation of the world
began at sunset on 9 September 5779 years ago.

According to scientific accounts  the earliest stages of the universe's
existence are estimated as taking place 13.8 billion years ago,

Ancient bible's writers knew time is relative concept:
'‘But do not forget this one thing, dear friends:
With the Lord a day is like a thousand years,
and a thousand years are like a day.''
/ 2 Peter 3:8–9 /

Scientists sure, bible's measurement is wrong and only their
scientific measurement of time existence is correct and absolute.
===
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Re: ''TIME'' - definitions

Postby lateralsuz on January 15th, 2020, 6:41 am 

I think it is right to say that time is a concept, as it can be perceived in different ways, under different circumstances. To me it demonstrates a rate of change.

Is there such a things as 'universal time' - an underlying set pace for everything, (which we might still observe in different ways)? Possibly, but we have no basis on which to calibrate that perception, and even if we did, we would still be subject to its many different effects in different circumstances.

However, these comments still refer to the concept.

So is Time an actual mechanism which generates/regulates Time? We have no way of knowing, but as examples of other philosophies, (such as ancient Greek I believe - perhaps earlier), it was argued that Time was the stuff that gave movement to static matter.

However, updating ideas to the modern era, is it possible to argue that Time a consequence of some 'framework for existence', (whether you dress it up as spacetime or some other notion), you first have to believe that spacetime or its equivalent is a 'thing' in itself - which I do not believe.

Is it conceptually possible to have Time without matter? Yes of course.
If there is any change then there is the associated consequence of sequence and therefore Time.
Much depends on what your philosophy believes are other states of existence prior to the Big Bang, in the middle of a Black Hole, or wherever else your mind takes you. Whether that is measurable is a different matter - but if it happened then I would argue that Time did arise at that point - whether conceptually or physically.
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Re: ''TIME'' - definitions

Postby socrat44 on January 18th, 2020, 6:53 am 

lateralsuz » January 15th, 2020, 6:41 am wrote:Is it conceptually possible to have Time without matter?
Yes of course.


1 - Without gravity planet Earth you don't have ''Time''
Gravity conditions create ''time'' as . . . t = d/v . . .
(difference between ''then'' and ''now'' )
2 - Without gravity ''time'' is frozen, static - as the movement
of quantum of light in the vacuum tells us.
===
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Re: ''TIME'' - definitions

Postby socrat44 on July 1st, 2020, 12:38 am 

Proper time
https://en.wikipedia.org/wiki/Proper_time
------
It means, SRT plays with two kinds of time:
1- ''proper time'' --- ''independent of coordinates''
In terms of Minkowski four-dimensional spacetime,
''proper time'' is Constant on the World line

2 - ''proper time interval'' between two events
on the Word line is the changes in the ''proper time''.
This ''proper time interval'' is Relative property
====
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Re: ''TIME'' - definitions

Postby zetreque on July 3rd, 2020, 12:26 pm 

O'Hara : Time. Time. What is time? Swiss manufacture it. French hoard it. Italians squander it. Americans say it is money. Hindus say it does not exist. Do you know what I say? I say time is a crook.
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