Nano Paint Could Make Airplanes Invisible to Radar

Nano Paint Could Make Airplanes Invisible to Radar: This effect works, Guo says, because the nanotubes are perfectly absorbing, and because when they are grown with some space between them, as in his experiments, their index of refraction is nearly identical to that of the surrounding air. This means that light won't scatter out of the nanotubes without being absorbed.