Yes. (semaphore)
Kilalakita
Infrared light Microwaves Visible light
Visible light waves
Visible light.
Boats (people) can communicate silently with flags or light signals.
visible light is the only VISIBLE light.
Fiber Optic networking allows computers to communicate with a beam over light oven thin strands of glass cabling.
One way to do that is to silently move parts of your body in understood and agreed patterns in order to convey signals to other people who see you as you do it. One example of this strategy is: Wave at your friend across the street.
The answer is visible light. Visible light is light that can be seen with a naked eye
Visible light is visible (for the human eye), infrared is not. Infrared has a longer wavelength, and a higher frequency. visible light is visible to human i.e the VIBGYOR, above vibgyor are ultravoilet light which is not visible to human eye and below vibgyor are infrared light which is also not visible to human eye.
Everyone with eyesight and a job does.
the luminous energy to help people light up their home to make things visible.