David VanHorn <dvanhorn <at> microbrix.com> writes:

> Gargoyle on the "Great seal bug"
> 
> It was a resonant cavity, totally passive.
> You paint it with a beam, and the reflected energy is amplitude modulated by
> the audio.

Thanks, I have read that before. I was saying that the beam must be so strong it
would trigger threat warning indicators. Both the 'seal' and this thing are
subject to the radar equation, lacking their own source of energy. That's why
the beam needs to be very powerful.

Peter


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