The detection was of uv-vis thru a traditional double convex (glass) lens.
Can a parabolic reflecting lens focus and detect RF with this same coating, or stereoscopically 2 parabolics, with sufficient amplification ?
Detection of uv-vis with these metals of low work function is by the photoelectric effect.
But what was the phenomena of Marconi's transatlantic detection of RF (and its associated keyed Morse CODE) by the silver nickel powder "coherer" in the circuit?
Are there electrical component specifications for the coherer (V, I, R). The electrical schematic produced by Google searches shows a DC circuit with an Antenna symbol and other recognizable elements, but the "coherer" is not symbolized but is a 2D sketch of what it actually looked like.
Note: The lay word for parabolic is "dish".
hi,
The electrical parameter Resistance is the measurable quantity which undergoes changes as the ferrous particles of the coherer are exposed to the impinging electromagnetic field. Even though google may not show any particular details, one can just measure the DC resistance (DC circuit with an antenna) to detect RF signals using coherer. If you use metallic parabolic reflectors and place the coherer at its focal point, the signals will be highly concentrated on it. This will to see the changes in the resistance value relatively with an ease.
Regards
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