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→Electromagnetic field detector (sound)
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Make a ghost detector. [https://www.youtube.com/watch?v=oA5cuLMHIsY] | Make a ghost detector. [https://www.youtube.com/watch?v=oA5cuLMHIsY] | ||
==== | ==== Sound detector ==== | ||
==== Nonstandard photography ==== | ==== Nonstandard photography ==== | ||