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19/11/2025 at 9:27 am
#15434
Man LamParticipant
One more experiment that you can do it is to use amplitude modulation of light to transmit sound. This experiment can show the amplitude of light. There is a commercial product on the market already but I prefer to ask students to build their own ones.
Materials/equipment:
a little solar panel
LED light torch or 3W LED or solid state red laser
3.5mm jack
self powered speaker