Analog radio signals are transmitted using light in the radio area of the spectrum.
If it was transmitted using the visible spectrum instead (using a visible light emitting device instead of a radio antenna, obviously), what would it look like?
Would it look like a solid light, because the vibrations would be imperceptibly fast? Or would one be able to visually tell when a voice started and stopped talking? Would you be able to see the difference between high and low pitches? Loud and quiet? Multiple tones and a single tone?
Has anyone ever done this (e.g. transmitted analog audio over fiber optic or something like that)?
Edit: another way to think of this question. You know how you can take an x-ray video recording and then create a visual-light video with it (examples)? Imagine you do the same thing with a radio-wave video camera pointed at a radio tower broadcasting analog audio.