How about light bulbs, solar panels, thermocouples, batteries, fuel
cells, and fireflies?
Roy Lewallen, W7EL
Tarmo Tammaru wrote:
Any transducer I can think of offhand converts between mechanical energy and
electrical energy, as for instance a loudspeaker, microphone, mechanical
filter, etc.
As for the impedance of free space, one way to build a stealth aircraft is
to cover it with material that has a resistivity of 377 Ohms/square. Then
there is no reflection
Tam/WB2TT
|