Recent content by Exnihiloest

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    A Electron spin resonance in metals

    It's an interesting lead, as I'm searching for an experimental protocol. I should have to "stabilize" the free electrons (I don't yet know how, but I don't need sharp lines, it's just to test a vague idea with the purpose of using it in classical electromagnetism).
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    A Electron spin resonance in metals

    In practice, ESR/EPR seems to concern only unpaired electrons in the outer layers of organic radicals or complexes. But what about the free electrons of metals? Does it also give rise to a signal? I can't find any information on the web. Thanks
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    What is the Speed of the Signal/Current from Switch to Lamp?

    Sure, but I don't use not correct images :-) I agree that my image is very simplifying and so, it can't be "correct" stricto sensu. Its purpose was not to perfectly modelize a physical process, but just to show why the "speed of electrons" is not a relevant data when it is question of a...
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    What is the Speed of the Signal/Current from Switch to Lamp?

    I agree that such an image is very simplifying and so, it can't be "correct" stricto sensu. Its purpose was not to modelize a physical process, but just to show why the "speed of electrons" is not a relevant data when it is question of a signal transmission. Your underlying image is that of a...
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    Magnetic force in a moving inertial reference frame

    There is no force onto a test charge at rest near a current carrying wire at rest. "The separation between the electrons in the current carrying wire is not Lorentz contracted because there is only a finite number of electrons in the wire and charge is conserved. Thus the electron remains...
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    Can Beats Be Heard When Tuning a Guitar Using the Beat Method?

    Interference is just two waves that add (vectorially, so they can cancel each other). If the frequency is the same, the interference is only in space. So there are places where the waves cancel each other, or add constructively elsewhere. If the frequency is not the same, the waves "beat" in...
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    What is the Speed of the Signal/Current from Switch to Lamp?

    Unlike the electric wave in a conductor, the electrons move very slowly (at about mm/s for currents in order of 1A). In spite the wave description is the best for explaining the propagation of a signal in a conductor, a simpler image of corpuscular description in layman's terms can also be...
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    Magnetic force in a moving inertial reference frame

    In the referential of the magnetic field source, the observer sees the moving particle deviated by the Lorentz force F=q*VxB (V and B are vectors). In the referential of the particle there is a transverse electric field E=VxB and the force onto the particle is F=q*E, the same. This is...
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