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Can an iPhone placed inside a water tank receive wireless LAN signals?
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[QUOTE="Baluncore, post: 6899790, member: 447632"] While water attenuates the signal more than air, it is more the step change in dielectric constant at the antenna-water-air boundaries, that makes water difficult. There is also a problem with determining direction in the presence of refraction at the boundary. That refraction makes it possible to "see" underwater transmitters better, since signals approaching the surface steeply from below, are bent to travel along the surface in the air, rather than to radiate up into space. Yes, it would decrease, but only slightly. Phone signals passing through the tornado would be attenuated, but since the volume of the tornado is small compared with the volume of the room, you would probably not notice the difference. There are many different paths taken by phone signals. The phone signal is spread spectrum, modulated by a digital sequence, so only the strongest signal is locked, and is decoded, all the other path lengths are ignored because the digital signal is out of time, delayed by the longer path. Spread spectrum was originally developed by the military to prevent jamming of their signals. It works well for mobile phones and data links. Having fluttering aluminium foil tassels, attached to a fan, will not destroy the quality of a mobile phone signal. [/QUOTE]
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Can an iPhone placed inside a water tank receive wireless LAN signals?
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