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RECENT POSTS IN THIS TOPIC

Jason Wolfe: on 7/3/20 at 4:50am UTC, wrote Have you considered that the spacetime continuum is made of a near infinite...

Jason Wolfe: on 7/3/20 at 1:04am UTC, wrote If we're talking about the physical universe, than I think you have to talk...

Héctor Gianni: on 7/1/20 at 22:18pm UTC, wrote Dear Lorenzo Maccone, John R. Cox, Jim George Sowdon: ...

Jim Snowdon: on 6/30/20 at 12:21pm UTC, wrote Hi Hector, May I invite you to read my most recent postings,...

John Cox: on 6/30/20 at 1:18am UTC, wrote Hector, your points are well taken. However I think it important to also...

Héctor Gianni: on 6/29/20 at 22:20pm UTC, wrote To whom is interested The experimental meaning of "the so called time" is...

Zeeya Merali: on 6/23/20 at 18:37pm UTC, wrote Hi there, I didn't realise it had been closed! It's now re-opened.

Vesuvius Now: on 6/23/20 at 18:24pm UTC, wrote Would it be possible to re-open the "The Nature of Time" forum? Research on...


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FQXi BLOGS
December 2, 2020

CATEGORY: Blog [back]
TOPIC: What is Time? by Lorenzo Maccone [refresh]
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FQXi Administrator Zeeya Merali wrote on May. 30, 2020 @ 15:04 GMT
FQXi's Lorenzo Maccone delves into the one of the deepest question in philosophy and discusses what modern physics can tell us about the nature of time. This introductory lecture discusses relativity, time travel, and quantum gravity.

Keywords: INSPYRE schools time quantum relativity timetravel quantumgravity wheelerdewitt



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Vesuvius Now wrote on Jun. 23, 2020 @ 18:24 GMT
Would it be possible to re-open the "The Nature of Time" forum? Research on time has not stopped and the forum could still be useful.

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FQXi Administrator Zeeya Merali replied on Jun. 23, 2020 @ 18:37 GMT
Hi there,

I didn't realise it had been closed! It's now re-opened.

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Héctor Daniel Gianni wrote on Jun. 29, 2020 @ 22:20 GMT
To whom is interested

The experimental meaning of "the so called time" is "movement".

Time is a measuring system created involuntarily by pre-historic man, and has no physical existence.They had not other way to predict hunting season.Antropologist said that man use Time since 25. to 30.000 years ago.

"Movement" is a physical property of every physical existing thing, that's why is everywhere and afects everything.The twin paradox only posible explanation: Man metabolism imply chemical conbinations which imply physical "movements" those movements would be slower for the astronaut twin who is in the spaceship at great speed respect his twin on land; the speed inertia would make a slower metabolic life for the astronaut living slower and less than his twin on land who would be older than the astronaut is; the twin on land lived more. Héctor Daniel Gianni

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John R. Cox replied on Jun. 30, 2020 @ 01:18 GMT
Hector,

your points are well taken. However I think it important to also recognize that 'blocktime' itself ignores the question of 'speed of time', such that the universe is commonly treated as existing at a common rate of time without actually stating so. And Lorentz points toward the fabled 'hidden parameter', length contraction is only expressed along one dimension and there is no accepted postulate which relates density variance as an inverse of velocity. Yet even in its infancy Relativity can account for the seemingly paradoxical behavior of radio-isotopes surviving billions of years of interstellar space in the extremely low gravitational potential at which non-relativistic theorizing would require decay rates to accelerate.

I like to think that we haven't yet scratched the surface of reality. If this topic catches on, I'm certain only that we will all end up thoroughly 'scratched'. best wishes jrc

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this post has been edited by the author since its original submission

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Jim George Snowdon replied on Jun. 30, 2020 @ 12:21 GMT
Hi Hector,

May I invite you to read my most recent postings, which are in the `Nature of Time` forum.

A convenient link to it is in Zeeya Merali`s posting, which is located immediately above your own posting.

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Héctor Daniel Gianni wrote on Jul. 1, 2020 @ 22:18 GMT
Dear Lorenzo Maccone, John R. Cox, Jim George Sowdon:

If you really want to know now and forever What is Time?, I don't think you regret doing it, read my collaboration in the current FQXi contest: “No knowing Time definition and experimental meaning, Force physicists to theories creation, that make Physics Undecidable, Incomputable and Unpredictable, by Héctor Daniel Gianni.

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Jason Mark Wolfe wrote on Jul. 3, 2020 @ 01:04 GMT
If we're talking about the physical universe, than I think you have to talk about time and space together; at least that's what special relativity tells us. I never read any discussions about why the speed of light is invariant for all observers. But because it is, effects like time dilation and length contraction are proof that there is no single clock or absolute ruler that governs the universe.

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Jason Mark Wolfe wrote on Jul. 3, 2020 @ 04:50 GMT
Have you considered that the spacetime continuum is made of a near infinite number of quanta "gravitons", all of which have a built in clock and measuring stick.

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