"Tesla, with his almost preternatural insight into alternating current phenomenon... enabled him... to revolutionize the art of electric power transmission through the invention of the rotary field motor..."
In physics, a force field is a vector field corresponding with a non-contact force acting on a particle at various positions in space. Specifically, a force field is a vector field , where is the force that a particle would feel if it were at the position .
"The theory of relativity... showed in a conclusive way that the concept of the ether as a substance, to which Maxwells equations refer, had to be abandoned. ...the result was that the fields had to be considered as an independent reality."
"The subject of electric oscillation announced in a remarkable paper of Henry in 1842 and threshed out in its main features by Kelvin in 1856, followed by Kirchhoffs treatment of the transmission of oscillations along a wire (1857), has become of discriminating importance between Maxwells theory of the electric field and the other equally profound theories of an earlier date. These crucial experiments contributed by Hertz (1887, et seq.) showed that electromagnetic waves move with the velocity of light, and like it are capable of being reflected, refracted, brought to interference and polarized. A year later Hertz (1888) worked out the distribution of the vectors in the space surrounding the oscillatory source. ...Some doubt was thrown on the details of Hertzs results by Sarasin and de la Rives phenomenon of multiple resonance (1890), but this was soon explained away as the necessary result of the occurrence of damped oscillations by Poincaré (1891), by Bjerknes (1891) and others."
"Classical mechanics has been developed continuously from the time of Newton and applied to an ever-widening range of dynamical systems, including the in interaction with matter. The underlying ideas and the laws governing their application form a simple and elegant scheme, which one would be inclined to think could not be seriously modified without having all its attractive features spout. Nevertheless it has been found possible to set up a new scheme, called quantum mechanics, which is more suitable for the description of phenomena on the atomic scale and which is in some respects more elegant and satisfying than the classical scheme. This possibility is due to the changes which the new scheme involves being of a very profound character and not clashing with the features of the classical theory that make it so attractive, as a result of which all these features can be incorporated in the new scheme."
"The special theory of relativity owes its origins to Maxwells equations of the electromagnetic field."
"It turns out that the energy of a gravitational field—any gravitational field—is negative. During inflation, as the universe gets bigger and bigger and more and more matter is created, the total energy of matter goes upward by an enormous amount. Meanwhile, however, the energy of gravity becomes more and more negative. The negative gravitational energy cancels the energy in matter, so the total energy of the system remains whatever it was when inflation started—presumably something very small. ...This capability for producing matter in the universe is one crucial difference between the inflationary model and the previous model."
"The physicists definition of a field is the following. Its something that ... is spread everywhere throughout the universe. Its something that takes a particular value at every point in space. And whats more, that value can change in time."