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How does a 'field' become observer dependent?
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How does a 'field' become observer dependent?
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yor_on
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Re: How does a 'field' become observer dependent?
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Reply #860 on:
21/04/2014 15:04:37 »
It doesn't really matter as long as we can agree on what we see as being a same color, does it? Even if my 'red' isn't yours processing, as long as we both call it 'red' we agree.
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Re: How does a 'field' become observer dependent?
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Reply #861 on:
21/04/2014 15:06:52 »
So, we can agree on things, all over the world. Colors is one of those things, although, if you're a painter you might disagree
But let's presume we can.
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Re: How does a 'field' become observer dependent?
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Reply #862 on:
21/04/2014 15:46:14 »
Let us assume that taste and colors have much in common. They are then a expression of complexity, created by, and in, your brain, answering to some simple original blueprints, as the geometry relative your receptor.
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Re: How does a 'field' become observer dependent?
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Reply #863 on:
21/04/2014 15:49:50 »
And with different energies, treating my eye as a grid with excitations, over a time period I must get to a image(processed and synthesized by my brain). But how do I get to a color? How can the brain differ there?
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Re: How does a 'field' become observer dependent?
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Reply #864 on:
21/04/2014 15:54:22 »
We have the spin too, naturally. A very weird thing spin, everything spins. Integer spin particles are bosons like our photon, following Bose-Einstein statistics (taking no place), while half integer spins are called Fermions like electrons, following Fermi-Dirac statistics (they take a 'place').
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Re: How does a 'field' become observer dependent?
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Reply #865 on:
21/04/2014 16:09:03 »
Take a look at the explanation for
Why don’t “cheats” ever work on the uncertainty principle?
Particularly to how it explains polarization, because that is a spin as far as I know.
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Re: How does a 'field' become observer dependent?
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Reply #866 on:
21/04/2014 16:25:37 »
Then look at
What is “spin” in particle physics? Why is it different from just ordinary rotation?
Then I got interested in something called
Thomas precession
, as it seemed integral to the idea of some sort of modern equivalence between ordinary angular momentum (i.e a carousel spinning), and the idea of a atomic, or otherwise, microscopic spin.
That finally lead me to look at
Regarding Llewellyn Thomas’s paper of 1927 and the “hidden momentum” of a magnetic dipole in an electric field
You can read it, without solving the equations.
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Re: How does a 'field' become observer dependent?
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Reply #867 on:
21/04/2014 16:31:50 »
So?
Can we use spin?
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yor_on
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Re: How does a 'field' become observer dependent?
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Reply #868 on:
21/04/2014 16:49:09 »
Actually the question if there is a real equivalence between spin and classical angular momentum, or not, is something of a sidetrack to that question. Never been that good on walking the straight line
But I got interested, and so I had to see what I could understand from it. And if you read it I'm sure you're interested too.
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Re: How does a 'field' become observer dependent?
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Reply #869 on:
21/04/2014 16:58:19 »
The most important part of a polarization, or spin, I find to be given in
Why don’t “cheats” ever work on the uncertainty principle?
for this question at least. It's a mindtwist of sorts, a way to describe a polarization as a result of matter interaction with light, giving it 'two directions'.
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Re: How does a 'field' become observer dependent?
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Reply #870 on:
21/04/2014 17:16:37 »
I had a really concise description of interference combined with Feynman's approach to 'sum over paths', that actually presented interference as a way light must act. As usual I can't find it when I need it
but it connects strongly to the link above, in my mind. You need both I think, to twist your mind the right way. This one take you through a longer journey than the one I had in mind, but at a first look it is very similar in its final conclusions. Just allow it some time, and thought.
Reality Is—The Feynman Path Integral.
==
I'll throw in this one for free, just because I've always liked mathpages. They have some really good descriptions, and history lessons, there.
Feynman’s Ants.
Still haven't found the one I was thinking of though
===
And no. I don't really care whether it can be explained by photons solely. Even if it can be done it does not invalidate a wave picture, it's just me being curious, wanting to see if it could be done?
You live in a universe populated by a lot more than just you, and to me that is 'frames of reference' interacting. So waves is just as good as photons for describing it. And if you think of it, locality can not even be you. Practically speaking, using scaling, you're just too big, and no diet will help there.
«
Last Edit: 21/04/2014 18:00:30 by yor_on
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Re: How does a 'field' become observer dependent?
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Reply #871 on:
21/04/2014 18:58:02 »
So what is reality? If your taste is a geometry, and your sight? When you look at a astronomical photo they're often in colors, representing different types of mass, as a gas etc. But it's not space as you would see it yourself. It's like using sonar to help blind persons get a new 'sight', and the question if they then also will gain a ability to differ colors through it. What will they see? if we take a new born, getting, and adapting, to this possibility of sight, as he grows up?
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Re: How does a 'field' become observer dependent?
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Reply #872 on:
21/04/2014 19:12:26 »
The miracle here, isn't whatever underlying simplicity we will find through physics. The real miracle is the way we process and 'reconstruct' our reality into a ever growing complexity. Because we can do more complex things, the more we learn about nature. And your brain is the source from where it all comes, if there is any 'magic' to this world I would definitely place it inside the way a brain process information.
Not in nature by itself, broken down into its smallest parts.
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yor_on
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Re: How does a 'field' become observer dependent?
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Reply #873 on:
21/04/2014 19:29:43 »
As a afterthought, considering how we reconstruct our environment, what would a quantum computer see? Just consider it a supplementary study, no time limit.
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Re: How does a 'field' become observer dependent?
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Reply #874 on:
28/04/2014 17:20:56 »
One thing I'm wondering about, is whether spin can be considered equivalent to a angular momentum, or if we're looking at it backwards. Meaning, if a angular momentum comes from an idea of spin
In one case we have common very old knowledge that we connect to a new to explain it. In the other we have new knowledge that then tells us that we know very little about what we though was old common knowledge.
So, which one is it?
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Re: How does a 'field' become observer dependent?
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Reply #875 on:
28/04/2014 17:22:09 »
Or, they are in no way connected?
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Re: How does a 'field' become observer dependent?
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Reply #876 on:
28/04/2014 22:36:14 »
You know, I'm not thinking too good today. I've somehow lost my my momentum. And I don't really know if physics is the answer. I've found that I go to physics when I can't handle the way life crush innocents. Now, what is more important, the way we handle innocents, or physics?
I don't really know. I want to understand, but I also want to live. And life is short.
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Last Edit: 28/04/2014 22:39:31 by yor_on
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Re: How does a 'field' become observer dependent?
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Reply #877 on:
28/04/2014 22:46:56 »
Bravery, do you have it?
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yor_on
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Re: How does a 'field' become observer dependent?
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Reply #878 on:
28/04/2014 23:01:01 »
Let us put it another way. I know a guy, Jarmo, he does not know what fear is. People instinctively recognize him for what he is. Does that exclude him from my question? Nope, he asked me once in what circumstances a lie would be acceptable. I told him to never lie, because a lie diminish you. If you can't tell the truth, be quiet. Then again, what are you true though? your lies, or your truth?
Why do you live?
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Ethos_
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Re: How does a 'field' become observer dependent?
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Reply #879 on:
28/04/2014 23:03:46 »
Quote from: yor_on on 28/04/2014 22:46:56
Bravery, do you have it?
Bravery??? If I might draw a parallel: Bravery can be described as observer dependent in many cases.
So exactly what is bravery?
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