Word: electromagneticism
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Dates: during 2000-2009
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IP telephony is even making inroads into the wireless industry. For now, most hospitals ban cell-phone use in patient areas because the phones can produce electromagnetic radiation that interferes with hospital monitors. That has forced patients and nurses to rely on archaic paging systems. Evanston Northwestern Healthcare in Evanston...
If you're not looking closely, it's easy to miss the wi-fi antenna atop San Bruno mountain just south of San Francisco. There are a couple of dozen TV and radio broadcast towers, each about 300 ft. tall, surrounded with chain-link fences and electromagnetic radiation warning signs...
Magnetically induced fluctuations in electric current are powerful enough that telegraph operators used to shut off their batteries during periods of high electromagnetic activity and use the induced power alone, Kohl said.
The Laser Long before the laser was invented, Albert Einstein reckoned that excited molecules hit by photons would produce an amplified signal. In 1960 Theodore Maiman built the first working laser (short for light amplification by stimulated emission of radiation), a coherent beam of electromagnetic energy produced by light waves...
Pathfinder's rover was a toy-size machine. Barely 1 ft. high and 2 ft. long and weighing 24 lbs., it operated for three months and in all that time toddled across a stretch of Martian terrain little bigger than a football field. The new rovers are much closer to...