Source: Microwave laser fulfills 60 years of promise : Nature News & Comment As the wavelength increases, effective energy transfer to larger objects, especially those with lengths of microwave dimensions, increases. If you want a 'death ray,' a maser operates at better frequencies than most lasers, even the IR ones. For example, finding stealth aircraft, this maser has the power needed to find them not by reflected back but by the diverted signal. This is huge. Bob Wilson
