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Originally Posted by HarryT
You can't practically broadcast power - you're killed by the inverse square law - you need to transmit massive amounts of power for even a tiny amount to be picked up by a receiver.
The point of this MIT idea is that the power isn't being "broadcast", but instead directly transferred from the transmitter to the receiver (which are linked by "resonance coupling") via some kind of "quantum tunnelling" effect. Their claim is that it should work over a range of several metres, and be highly efficient.
It would be great if it ever came to fruition as a practical concept. They're just talking theory at present.
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Would that mean that they would have to transmit in a closed or controlled channel? Linear like laser? Or diffuse like waves?