"Stealth" is an array of technologies that can reduce vehicle signatures across significant portions of the EM spectrum. No technology can protect against all w

"Stealth" is an array of technologies that can reduce vehicle signatures across significant portions of the EM spectrum. No technology can protect against all wavelengths you might usefully use to detect, and you cannot be equally stealthy with respect to every wavelength from every angle, but you can dramatically reduce the overall apparent cross section (several orders of magnitude) and thus make the vehicle more survivable.