VOLKER STEGER / SCIENCE PHOTO LIBRARY VOLKER STEGER / SCIENCE PHOTO LIBRARY
Electromagnetic measurement. Technician with an antenna for measuring electro- magnetic emissions from an electrical device, in this case a power drill. These emissions are believed to be a cause of cancer and mood changes by some researchers. Emissions from one device may also interfere with sensitive nearby devices, such as computers. The emissions are produced by a flowing electric current, such as in a power cable. The emissions affect the movement of charged particles, such as electrons in another electric current, and ions produced during biochemical reactions within the body.
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