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Updated: May 21, 2025
From this hypothesis he deduced that, in the medium where this energy is localized, an electromagnetic wave is propagated with a velocity equal to the relation of the units of electric mass in the electromagnetic and electrostatic systems.
In this case the universe must of necessity be spatially unbounded and of finite magnitude, its magnitude being determined by the value of that mean density. If we consider the gravitational field and the electromagnetic field from the stand-point of the ether hypothesis, we find a remarkable difference between the two.
He had stumbled upon the electromagnetic effect in the first recorded instance of a wire behaving like a magnet when a current is passed through it. A development of Oersted's demonstration with the compass needle was used to construct the world's first system of signaling by the use of electricity.
Such was the state of things when H. A. Lorentz entered upon the scene. He brought theory into harmony with experience by means of a wonderful simplification of theoretical principles. He achieved this, the most important advance in the theory of electricity since Maxwell, by taking from ether its mechanical, and from matter its electromagnetic qualities.
The same effect will be produced by the application of a quick, cold spray to the warm body. It is the sudden lowering of temperature on the surface of the body or in the lungs and the resulting contrast between the heat within and the cold outside, that causes the increased manifestation of electromagnetic energy in the system.
Almost all the serious intellectual labour required for the possibility of this invention is due to three men Faraday, Maxwell, and Hertz. In alternating layers of experiment and theory these three men built up the modern theory of electromagnetism, and demonstrated the identity of light with electromagnetic waves.
At these frequencies, the three centimeter band of the electromagnetic spectrum, energy does not flow on wires as it does in the lower frequency regions. Here plumbing is required. But Mike, amongst other things, was an expert RF plumber.
If both poles of this little instrument are exposed to the same temperature, there is no manifestation of electricity; but if one of the poles be attached to the warm body and the other immersed in cold water or exposed to cold air, the liberation of electromagnetic currents begins at once.
The electron affords us the possibility of considering inertia and mass to be no longer a fundamental notion, but a consequence of the electromagnetic phenomena. Professor J.J. Thomson was the first to have the clear idea that a part, at least, of the inertia of an electrified body is due to its electric charge.
Maxwell's theory thus establishes a close correlation between the phenomena of the luminous and those of the electromagnetic waves, or, we might even say, the complete identity of the two. But it does not follow from this that we ought to regard the variation of an electric field produced at some one point as necessarily consisting of a real displacement of the ether round that point.
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