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Old Aug 25th 2018, 10:26 PM   #11
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Originally Posted by htam9876 View Post
Dear dragon, it will take me sometime to understand your post because I can't find some words in my dictionary. I hope that one day I am honored to see the electronic microscope under your instruction.It's so interesting. Now I am just confused in logic. The wave character and the particle characer, which one first(exist in cosmos)?
So far as I know there is no evidence that waves and particles give separate results. They are equivalent descriptions of Physics.

There is a "result" or guess or something: every time we search for a wave we find a wave and every time we search for a particle we find a particle. (For example, Young's double slit experiment finds light waves, the Planck's blackbody spectrum finds photons.

-Dan

PS You know, you can ask us about words aren't in your dictionary. Sometimes Physics notation can get garbled between languages.
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Old Aug 26th 2018, 04:25 AM   #12
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duality

The tramp always consider that the American captain is a hero. Wave particle duality is based on microscopic physical structure,it's not an adequate condition but the neccesary condition and will not disappear following the development of people's theory. The tramp find an electron moving in the first Bohr track under the guide of the captain, but he can't find electromagnetic wave released, some problems with classical electromagnetism? what's it?
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Old Aug 26th 2018, 10:18 AM   #13
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Originally Posted by htam9876 View Post
The tramp always consider that the American captain is a hero. Wave particle duality is based on microscopic physical structure,it's not an adequate condition but the neccesary condition and will not disappear following the development of people's theory. The tramp find an electron moving in the first Bohr track under the guide of the captain, but he can't find electromagnetic wave released, some problems with classical electromagnetism? what's it?
I need to emphasize something here: The energy states in Hydrogen, for example, do not define paths in space. This would mean that the electron is moving on the circumference of a circle and the Uncertainty Principle forbids this.

On the Classical (macroscopic) scale Maxwell's electromagnetism is a good description of what goes on. On the microscopic scale this is not true. The fact that an electron in an atom does not radiate EM waves is a good example of how it breaks down. On the quantum level we have Quantum Electrodynamics (QED). This is the quantum field theory that describes electromagnetism on the microscopic scale.

-Dan
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Old Aug 26th 2018, 06:17 PM   #14
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duality

I am a bit philosophical. We see the aspect we can see. It's certain. Behind Bohr, theory trys to describe the uncertain aspect and people find that even the orientation of electron cloud has to follow men's will and people become so satisfied.............................
What's the definition of electrical current in classic?
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Old Aug 26th 2018, 07:35 PM   #15
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Originally Posted by htam9876 View Post
I am a bit philosophical. We see the aspect we can see. It's certain. Behind Bohr, theory trys to describe the uncertain aspect and people find that even the orientation of electron cloud has to follow men's will and people become so satisfied.............................
What's the definition of electrical current in classic?
This really doesn't sound like Physics or even Meta-physics. Physics is a set of laws that describe the working of the Universe. Part of the task of a Physicist is to experiment and to classify.

I don't know what you mean by the "orientation" of the electron cloud. It sounds like you are trying to put some kind of human order to it. The Universe (creator if you will) doesn't follow our will... all we can do is describe the laws that it obeys.

You need to learn to do some web searches. Google electric current.

-Dan
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Old Aug 27th 2018, 12:32 AM   #16
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The classical definition of electric current is about that: charge unit time passing through a surface...right?
But that surface establish in what coordinate system?
Suppose that if the tramp hug an electron and move in 200000 v grid, will he feel no current?( here negative charge serve as the moving charge for convenience of discussion only)
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Old Aug 27th 2018, 11:07 AM   #17
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Originally Posted by htam9876 View Post
The classical definition of electric current is about that: charge unit time passing through a surface...right?
But that surface establish in what coordinate system?
Suppose that if the tramp hug an electron and move in 200000 v grid, will he feel no current?( here negative charge serve as the moving charge for convenience of discussion only)
No coordinate system needed. Generally the moving charges are confined by something like a wire and we can simply define a surface and measure the charges passing through that.

A single moving charge is technically a current but it's easier to just think of it as a single moving charge.

What do you mean by "hug?" 擁抱

Also, this is off topic. If you wish to continue talking about currents then please make a new thread.

-Dan
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Old Aug 28th 2018, 03:00 AM   #18
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yes,sir. the tramp will hug (拥抱) the electron and go to a new thread...but it will seem a bit 分散的(how to speak it in English...).
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Old Aug 28th 2018, 04:34 AM   #19
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This seems to be another of those cases where the transfer of thinking from "classical" to "Quantum Mechanics" is causing confusion.

Considering electrons as tiny point like objects (particles) is hugely misleading
Considering electrons as some kind of wave is scarcely any better.

They are "something" else, but it is difficult to say what...
There seems to be nothing in our normal "classical" world view that can be used to compare them with.

Perhaps all we can do is to say that their behaviours follow a pattern which we can describe via certain mathematical models.
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Old Aug 28th 2018, 05:32 AM   #20
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Originally Posted by Woody View Post
This seems to be another of those cases where the transfer of thinking from "classical" to "Quantum Mechanics" is causing confusion.

Considering electrons as tiny point like objects (particles) is hugely misleading
Considering electrons as some kind of wave is scarcely any better.

They are "something" else, but it is difficult to say what...
There seems to be nothing in our normal "classical" world view that can be used to compare them with.

Perhaps all we can do is to say that their behaviours follow a pattern which we can describe via certain mathematical models.
I've heard one author refer to them as "wavicles."

-Dan
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