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Electromagnetic spectrum
New ‘T-ray’ tech converts light to sound for weapons detection, medical imaging
Seeing in the Dark
New system uses low-power Wi-Fi signal to track moving humans — even behind walls
Image sensors out of a spray can
New Research Could Mean Cellphones That Can See Through Walls
Carriers Warn of Crisis in Mobile Spectrum
Breakthrough could make smartphones and laptops 1,000 times faster
New Hybrid Solar Cells Harness More Of The Sun’s Light Spectrum
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