just likes radios and such. i had a brief discussion with my math teacher on the subject, my math teacher was an electonical engineer at Bell Laboratories for 10 years, and i asked if its possible with radio, cant it be done with any light? He said yes. what i didnt ask him was, how exactly it works, because we were in the middle of class. so how does information travel on light waves? bonus quesiton: what would it look like if it was sent through visible light?