Time Explained

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lpetrich
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Re: Time Explained

Post by lpetrich » Sun May 16, 2010 10:24 pm

Farsight wrote:I haven't got it backwards, lpetrich. Look above at how we define time. We really do define it using motion. When we "measure time", what we're actually measuring, is motion. Clocks clock up motion, not time. You can't see time, you can't see time flowing, you can't see any "travel through time". Hold your hand up a metre apart. There's a gap between them. A space. You can see this. Now waggle your hands. Make them move. You can see this too. You can see space and motion through it. Hence you assign the primacy not to time, but to motion, because you can see it.
:roll:
What a dumb argument. Why don't you think about what it means to see an object? It's much less simple than what you seem to think.

Also, we don't see space, any more than we see time. Seeing object separation != seeing space directly.
lpetrich wrote:Farsight, why don't you try to work it out mathematically? You won't get taken seriously unless you can do at least as well as mainstream physics in getting LOTS of VERY precise numbers.
It can't be worked out mathematically.
:roll: again.
Galileo wrote:Philosophy is written in that great book which ever lies before our eyes. I mean the universe, but we cannot understand it if we do not first learn the language and grasp the symbols in which it is written. This book is written in the mathematical language, and the symbols are triangles, circles and other geometrical figures, without whose help it is humanly impossible to comprehend a single word of it, and without which one wanders in vain through a dark labyrinth. -- The Assayer (1623)
He was overall correct, though we'd nowadays add derivatives, integrals, Lie algebras, differential geometry, etc.
Farsight wrote:Mathematical expressions are great at telling you how terms relate to one another, but they don't actually tell you what the terms really mean, and they don't give you a picture of the underlying reality.
So you want pretty pictures in your mind? How is that supposed to be "underlying reality"?
lpetrich wrote:Which you interpret as meaning that electrons have tiny sort-of-gyroscopes in them.
I didn't say that. I said the electron is literally made from light, and the scientific evidence for that is pair production.
What horse doo-doo. Quantum electrodynamics not only accounts for pair production, it also accounts for how fast it happens and the distribution of outgoing particles in it.
Then I said the electron exhibits magnetic dipole moment, which is a display of real rotation.
The magnetic moment pops right out of quantum-mechanical spin and electrodynamics. In fact, it's rather straightforward to demonstrate that in the case of the Dirac equation. Farsight, can you please show us why it doesn't?

In fact, the Dirac equation provides the correct lowest-order prediction of the magnetic moments of the electron and the muon. They have some additional magnetic moment that must be calculated with quantum electrodynamics and related Standard-Model theories. However, these calculations agree with observations to within vary high accuracies.
Then I said that the Stern-Gerlach experiment fits with two spin components in two orientations,
That fits in with quantum mechanics VERY well, and not at all with classical mechanics. From QM, we find that a beam of electrons or atoms/molecules/ions gets split up into several beams, each one with a different projection of the spin onto the magnetic field. In the continuous limit, those beams become a continuous fan.
and the Einstein-de Haas effect demonstrates that spin angular momentum is indeed of the same nature as the angular momentum of rotating bodies as conceived in classical mechanics.
Farsight, you've yet to prove that quantum-mechanical spin cannot possibly cause this effect.
You're disregarding this scientific evidence in favour of what? Other scientific evidence? No. You dismiss it in favour of what you think you know.
All you are doing is cherry-picking and sometimes misinterpreting.
lpetrich wrote:Without bothering to try to explain why the Dirac equation works so well for electrons, other charged leptons, and quarks.
It's the first time it's come up here, and I've got to explain other simpler things first, like t and E and m and c and C and G.
Irrelevant. The real question is why you seem to think that the Dirac equation is wrong.
lpetrich wrote:Neutrinos are a special case; they could follow a similar sort of equation, the Majorana equation, or they could follow a mixture of the two.
Yes, pesky neutrinos muddy the waters. Perhaps interestingly (or perhaps not!) nowadays I'm seeing the neutrino as more like a photon than an electron.
Good Grief! What makes a neutrino more photon-like? Why do you think that it is not some neutral electron-like particle?

Farsight
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Re: Time Explained

Post by Farsight » Mon May 17, 2010 9:35 am

lpetrich wrote:What a dumb argument...
You can see there's a space between your hands. When you waggle them, you can see them moving. But you can't see time. And it's as simple as that. There is no time flowing, thereare no wormholes, there is no travelling through time. Sadly people do rather cling to beliefs for which there is no observable evidence.
lpetrich wrote:...the real question is why you seem to think that the Dirac equation is wrong.
No, it isn't, and no I don't. But if you wish to discuss it further, please do so on th electromagnetism thread.

ChildInAZoo
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Re: Time Explained

Post by ChildInAZoo » Mon May 17, 2010 11:22 am

Farsight wrote:You can see there's a space between your hands.
What does it look like? Does that space always look the same? If it doesn't, how can you tell that it's the same space? If it's not always the same space, how do you tell if it's a different space or the same space at any given time? Ooops, I used "time". How do I see an eternal space between my hands?

Brain Man
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Re: Time Explained

Post by Brain Man » Mon May 17, 2010 2:08 pm

Farsight would i be right in saying that time is an effect of motion so for example in a dipole..the only point at time comes into play would be when radiation occurs ?

i.e. Time is not a direct product of electric or magnetic force its an effect of the motion produced by radiation ?

Farsight
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Re: Time Explained

Post by Farsight » Mon May 17, 2010 2:42 pm

Brain Man wrote:Farsight would i be right in saying that time is an effect of motion so for example in a dipole the only point at time comes into play would be when radiation occurs? i.e. Time is not a direct product of electric or magnetic force its an effect of the motion produced by radiation?
I wouldn't limit it to radiation, Brain Man. An electron can move uniformly without radiating. It only radiates when you accelerate it, like in a synchrotron like the Diamond Light Source.

ChildInaZoo: it looks like what it is - the gap between your hands.

Anybody see Stephen Hawking's Universe on Discovery last night?

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Re: Time Explained

Post by ChildInAZoo » Mon May 17, 2010 2:49 pm

Farsight wrote:ChildInaZoo: it looks like what it is - the gap between your hands.
Since you apparently won't answer the physics questions, please don't dodge the simple ones. What does the gap between your hand look like?

Farsight
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Re: Time Explained

Post by Farsight » Mon May 17, 2010 3:20 pm

A gap. It looks different to what you see when your hands are pressed together. And when you waggle your hands it looks different again. This is the empirical observable evidence for space and motion. Open the back of a clock and you see cogs and gears moving through space. You don't see time, you don't see time flowing, and you don't see travel through time. Now please read the opening posts, and attempt to point out any flaw in the patent scientific evidence and simple deductive logic. When you cannot, you'll doubtless concur with good grace that time travel is science fiction, because:

Time exists like heat exists, being an emergent property of motion. It's a cumulative measure of motion used in the relative measure of motion compared to the motion of light, and the only motion is through space. So time has no length, time doesn’t flow and we don’t travel through it.

ChildInAZoo
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Re: Time Explained

Post by ChildInAZoo » Mon May 17, 2010 3:48 pm

Whether or not time travel is science fiction is beside the point. You still have not answered what a gap looks like. Since you seem to be basing your entire theory of time on the claim that we can see a gap, this seems like and appropriate thing to ask you about. We can later move on to whether or not your idea of measuring a gap is consistent with what Einstein and others write about measuring a gap, but until later, let's see your description of a gap. If there is no such description, then I fear that we have to get rid of space as well as time.

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colubridae
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Re: Time Explained

Post by colubridae » Mon May 17, 2010 6:40 pm

*tsk* *tsk*
strange painting 2.jpg
strange painting 2.jpg (24.38 KiB) Viewed 871 times
The title of the painting is time transfixed
I Know you don't like me exposing your :bs: but
that was a half decent erudite piece of wit, what I posted innit. You could at least have acknowledged it...

:disappoint:
I bring erudition, style and savoir faire to the thread and all you bring is 'A' level Bermuda Triangle.

I am so depressed I will go and :lynch: myself then
You will be really :sorry:
You’ll all be really :sorry:


By the way doc/lamont nice to see you joining this thread
With farsight's scientific insight and your down-to-earth gritty realism all we need is mandelson’s humanitarian warmth and I’d say we could be looking at ‘Good Forums’ Thread-of-the-decade. :biggrin:
I have a well balanced personality. I've got chips on both shoulders

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mistermack
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Re: Time Explained

Post by mistermack » Mon May 17, 2010 9:22 pm

I didnt get it. I still don't. I'm a philistine when it comes to art. Give me a nice photo any day.
While there is a market for shit, there will be assholes to supply it.

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colubridae
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Re: Time Explained

Post by colubridae » Mon May 17, 2010 9:29 pm

mistermack wrote:I didnt get it. I still don't. I'm a philistine when it comes to art. Give me a nice photo any day.

errr... the painting title - Time Transfixed by Rene Magritte... a surrealist.


farsight's view that time is transfi...

oh forget it :fp:
I have a well balanced personality. I've got chips on both shoulders

LaMont Cranston
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Re: Time Explained

Post by LaMont Cranston » Mon May 17, 2010 10:05 pm

colubridae, I'm sure that we all appreciate your artistic contributions to this timely thread. However, it has been duly noted that some of the participants cast something of a blind eye to art. Some deeply meaningful comments about the subject have been done musically, including the following:

"Time" The Chambers Brothers
"Time Is On My Side" The Stones
"Time Won't Let Me" The Outsiders
"Time After Time" (Two songs with the same name, one done first my Frank Sinatra, the other by Cindi Lauper)
"Ain't It Funny How Time Slips Away" Willie Nelson

For God's sake, let's leave "By The Time I Get To Phoenix" by Glen Campbell out of the conversation.

Farsight
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Re: Time Explained

Post by Farsight » Mon May 17, 2010 10:36 pm

Don't let people spoil the thread, guys. Some people will do anything to prevent an open sincere discussion.

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Twiglet
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Re: Time Explained

Post by Twiglet » Tue May 18, 2010 2:09 am

Maybe someone could find a nice picture of a trainwreck.

LaMont Cranston
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Re: Time Explained

Post by LaMont Cranston » Tue May 18, 2010 2:52 am

Farsight, I'm probably one of the people you're talking about. I do think that most of us, including myself, are truly interested in this topic, but some of us cannot resist opportunities to inject whatever humor we can into some of these threads. (It's hard to pass up a straight line.)

I don't know why others behave that way. My excuse is that I'm a functional psychopath.

The Shadow knows...

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