Peter O. Brackett wrote:
...
Most hams are practical folk, interested in phenomena that occur (only)
within our legally assigned frequency bands. A select few are interested in
what happens outside our legally assigned frequency bands, and at least one
of our RRAA bretheren often takes us on excursions all the way up to
"daylight" to make his points futher down the spectrum! i.e. He takes us
up into the nether regions of optical frequencies to make his points. (God
Bless "Hecht"!)
...

At least one nano-technology/expermental solar cell depends on very
minute "antenna" covering its' surface, the light waves/photons striking
those "antennas" causes a DC current to flow from the cell ...

I see no one interested in phenomenon "outside of our assigned bands"
(light and RF are the same phenomenon.)

Well, except for those attempting to communicate on a "DC Carrier."

JS