iirc efficiency loss in wireless energy transmission is exponential? someone cor... | Hacker News

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		chrneu 10 days ago \| parent \| context \| favorite \| on: Drones that recharge directly on transmission line... iirc efficiency loss in wireless energy transmission is exponential? someone correct me. But basically after just a few mm the losses are so great that the amount of electricity needed becomes ridiculously wasteful. to power a running drone at more than a few inches would be just...a lot.

KaiserPro 10 days ago [–]

Inverse square, so each time the distance doubles the power density drops by a factor of four.

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