Will there ever be such thing as wireless energy?
Asked by
Mtl_zack (
6778
)
February 11th, 2009
Like, have something plugged into the wall, and be able to have it transmit the energy to whatever it is you’re using through the air?
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10 Answers
I think yes. If it can be thought of, it can some day exist. Think of that photo refiner/enlarger in Blade Runner. We’re already there.
@robmandu
On the lighter side, look at the two copper coils with the bulb in between, question is, would you reeeeeeeeeally want your manlihood in between those two?
Most energy in this old universe is transmitted without wires.
Here on earth, we transmit quite a bit of energy without wires. The trick is that, with significant transmission intensities, anything in the transmission path tends to get cooked.
From a DesignNews article about “WiTricity”:
The novelty of WiTricity is that Soljacic and his MIT team intentionally built energy emitters and receivers whose electromagnetic evanescent waves radiated great distances without significant decay. In addition, these evanescent fields were tuned to resonate with each other. In other words, the evanescent fields of the emitter and receiver “see” each other, but they can’t see extraneous objects with different resonances, even if those objects directly block the line-of-sight between emitter and receiver. The coupling of evanescent waves also makes this technique substantially more efficient than “beaming” energy via conventional electromagnetic radiation because these waves don’t dissipate energy to the environment.
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Even so, @TaoSan, I very likely would not. ツ
What part of the electromagnetic spectrum are “evanescent waves” ? Do they obey the cube function?
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