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by whatshisface
3122 days ago
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That can't be right because the amplitude of EM waves has nothing to do with spatial displacements (unlike guitar strings). The way it works is that every point in space has an E (electric) and B (magnetic) field vector which can oscillate around a 3D space. The vectors point towards other places in space, but their meaning is a field strength and direction at a single point. So this diagram[1] is actually describing the EM fields along a single line, not in the volume of space that the (purely illustrative) arrows are drawn in. The correct understanding of Faraday cages is that their holes must be small relative to the wavelength: this is easy to remember because on a very large wavelength scale you would expect the tiny holes to not be very noticeable, and on a very short wavelength scale you're essentially talking about the light that you can see your food with. https://en.wikipedia.org/wiki/Light#/media/File:Light-wave.s... |
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...the more likely you are to misremember things and mislead people, apparently. Leadership, hooo!