China says it has developed a quantum radar that can see stealth aircraft
Radar is a powerful military tool because it makes it possible to spot enemy aircraft beyond the line of sight. It does this by sending out a burst of radio energy, which bounces back when it encounters another object. So-called “stealth” aircraft attempt to get around this by becoming invisible to radar — either by using flat, angular shapes to reflect radar signals away from radar equipment or by using materials which absorb radar signals....