MIT-developed radar sees through concrete walls up to eight inches thick

MIT-developed radar sees through concrete walls up to eight inches thick: "MIT researchers have developed radar technology that provides real-time video of what is happening behind solid concrete walls measuring four to eight inches (10-20 cm) thick. Just like any other radar, the device emits radio waves that bounce off objects and then analyzes the return signal, but to give it its X-ray spec capabilities, the newly developed radar technology disregards the 99.9975 percent of the signal that returns to the radar after bouncing off the wall and amplifies the remaining 0.0025 percent of the signal that makes it through."

'via Blog this'