Home experiment demonstrates how light can carry sound, no wires required

A high school chemistry teacher demonstrated wireless sound transmission using an iPad, LED lights, and a solar panel. He connected audio signals from his iPad to an LED that pulsed with the music, then positioned a solar panel near the light to convert the brightness variations back into sound through a connected speaker. Upgrading to a laser diode allowed transmission across his living room with clear audio quality, proving that accessible components can recreate optical communication principles used in professional telecommunications.