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A comment on New Zealand is about to test long-range wireless power transmission. Parent comment

Re:New Zealand is about to test long-range wireless power tr... by mikedilger on Wednesday September 09, 2020 @05:51PM (#24426349)
Sunlight is spread-spectrum. This is focused at the frequency that makes water molecules vibrate - which is why we use it for ovens.
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Re:New Zealand is about to test long-range wireless power tr... by Johnythree on Thursday September 10, 2020 @05:15AM (#24430378)
Microwave ovens are not "focused at the frequency that makes water molecules vibrate".

This is an urban myth.

http://www.schoolphysics.co.uk/age16-19/Wave%20properties/Wa...

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Re:New Zealand is about to test long-range wireless power tr... by anilakar on Thursday September 10, 2020 @04:44AM (#24430205)
Microwave ovens operate at 2.45 GHz because of frequency management issues - we just can't afford to have jammers all around the spectrum. The first water absorption peak is actually at 22ish GHz.
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Re:New Zealand is about to test long-range wireless power tr... by Robotbeat on Wednesday September 09, 2020 @07:20PM (#24427106)
Any heat which is absorbed causes water molecules to vibrate. Including sunlight. There's nothing particularly special about being broad vs narrow spectrum in this case.
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