At 10:17 pm 20-03-05 -0300, you wrote: >On 20 Mar 2005 at 1:45, thomas malloy wrote: >> The cover would stop light from scattering by resonating at the same >> frequency as the light striking it. If such a device could >> cope with different wavelengths of electromagnetic radiation (including >> visible light), in theory, the object would vanish into thin air. > > Sure. But what happens with the object's shadow? > > Mark Jordan
What indeed. Presumably one would see a black hole moving across the sky against a starry background. Frank Grimer
