1) Power from mains to antenna, which is made of copper 2) Antenna resonates at a frequency of 6.4MHz, emitting electromagnetic waves 3) 'Tails' of energy from antenna 'tunnel' up to 5m (16.4ft) 4) Electricity picked up by laptop's antenna, which must also be resonating at 6.4MHz. Energy used to re-charge device 5) Energy not transferred to laptop re-absorbed by source antenna. People/other objects not affected as not resonating at 6.4MHz |
The answer the team came up with was "resonance", a phenomenon that causes an object to vibrate when energy of a certain frequency is applied.hat tip: Ilachina
"When you have two resonant objects of the same frequency they tend to couple very strongly," Professor Soljacic told the BBC News website.
Resonance can be seen in musical instruments for example.
"When you play a tune on one, then another instrument with the same acoustic resonance will pick up that tune, it will visibly vibrate," he said.
Instead of using acoustic vibrations, the team's system exploits the resonance of electromagnetic waves. Electromagnetic radiation includes radio waves, infrared and X-rays.
1 comment:
I was actually was researching this about a year ago in my University (at an undergraduate level)
It was inspired by the works of Nikola Tesla, from what I came across this is possible but they aren't using the full potential of Tesla's ideas, they are creating an antenna here that is essentially a dipole, but from my work I think that Tesla was using a monopole, or at least a dipole where one of the poles is the earth... so essentially making the other pole a monopole... to me this creates longitudinal wave forms (yes... science doesn't "believe" in them in free-space), from reading some of the paper that these guys at MIT released this may be related to their evanescent waves... but alas they seem to be mathematical scientist whereas I would approach things from a more heuristic direction. RESONANCE is the key, but it is a dying thing in such a digital world.
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