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Noise cancelling headphones. Well, bodyphones. I mean, you want to make it so that the "noise" received from the outside enters and simply disappears. This means it is converted into local energy by being actively cancelled out by the opposite phase signal. This can be done by making a metamaterial that has a 'negative permittivity' - instead ...


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For radar, you do not need (or want) insulating material - what matters is the reflectivity or opacity at radar frequencies, not the dielectric properties. The best way is to reflect the beam somewhere in the empty space, without scattering it. That means you need to cover yourself with flat reflective (i.e. metal) surface(s). Something like this: (image ...


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Here's an image generated by a millimetre wave radar imaging system pointed at a pair of animals wearing some biogenic insulating materials. Note that it does them little good. Here's a paper about using millimeter wave radar to track sheep, who are well known to wear thick biogenic insulating materials at various times of the year. The paper references ...


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I don't know the answer, mostly because anybody who knows how to control the weather isn't telling. But if you look at the range of upper-atmopsheric lightning you see there are quite a few phenomena involved. For example sprites can be visually impressive, to a very few inspired photographers at least. These phenomena are part of the overall electrical ...


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An indirect way would be to use the electric power to seed clouds. Cloud seeding is a type of weather modification that aims to change the amount or type of precipitation that falls from clouds by dispersing substances into the air that serve as cloud condensation or ice nuclei, which alter the microphysical processes within the cloud. Its effectiveness is ...


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Yes. But after you've watched how it was created, the rain will be anti-climatic First a direct "brute force" way of doing it. It takes a few steps, and making it rain is the least impressive part, and it uses a tonne of power (Like - 2020 entire Earth full years power generation levels). Best done on an overcast day with steady prevailing winds. ...


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