^ Yes. Well, maybe I should have said visible light just to emphasize the effect, but that would have been too technically limiting.
My bathroom has no windows, but I can maneuver around in there with the lights off just from stray light bouncing around the house . I couldn't read a newspaper, but I could find my toothbrush just from miscellaneous photons be-bopping around.
Typically, the human eye can detect wavelengths from 700 to 380 nanometers, red to violet (ROYGBIV).
Nanometers, 10minus nine. get it? Nano, nine?
For a reference point, the wavelength of a 1 GHz signal is about 0.3 meters, just about a foot. Your microwave (µwave) oven generates energy at a little less than half a foot. (Most I've seen were 2450 MHz, or 2.540 GHz. Note the decimal point shift of three places.)
I remember that in the first car we had with an FM radio (88-108 MHz) at certain speeds and locations, the signal would cut in and out very rapidly. The phenomenon was called "picket fencing." With today's higher sensitivity receivers and better AGC*, this rarely happens any more except maybe at the fringes of the broadcast station's range. OTR truckers might still notice this.
Oh well, 'nuffa that. Kind of a long walk from FM radio at 3.41 Meters (88 MHz) to 380 nanometers (Ultraviolet light).
Terry. 230RN
* Added: "AGC" = "Automatic Gain Control"