If light is just an EM phenomena like radio waves (with more energy) would it be possible to build a transmitter that transmits in the light range? If you were to do this, would you see light that just seems to propagating from the antenna?
Originally posted by arcnets
Nonono - radiation must be coherent from an antenna
Plus it must work 2-way. Ever seen a lightbulb convert light into electricity?
It's called a light bulb.
Yes. Antenna theory has to do with the Fourier-transform of the e.m. field. You can transform only pure (coherent) states, not mixed states.Originally posted by mmwave
Is this related to coherence as an assumption in a working antenna?