... I did mean medium rarefaction or compression propagation(using sound wave in air analogy, Tesla said that light is a sound wave in the Aether) when a material object moves through medium it generates such disturbances in medium if we could use a proper geometry we can manipulate medium but why cones do this better?!
Tesla was a genius inventor nevertheless with his longitudinal waves, he was wrong vs Maxwell. Light or EM waves are not like sound waves, and energy transmission at a distance by LC coupled circuits are perfectly modelized by Maxwell's equations. Even if we consider that EM fields are a medium perturbation (I agree with this idea), the propagating perturbation is transversal. The longitudinal perturbation (for example due to the Coulomb field of a charge oscillating back and forth) generates really disturbances in medium but the disturbances doesn't propagate by themselves, the varying field remains linked to its source. In any case, we need energy to perturb the medium and there is neither experimental nor theoretical evidence that the energy (propagating or not) that we could recover from the medium could be more than that we have put in. Another way would be to catch energy already present, called "ambient energy". But conventional electric/magnetic fields such EM waves from human activities or stationary waves around the earth at Schumann Resonance are by far too weak for a practical interest. The ZPF remains a promising way now the question is "how to recover an energy that lies at its minimal level".
|