character: Guglielmo Marconi
topic: Early Radio Communication Using Electromagnetic Waves
grade: 9
subject: Physics
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character: Nikola Tesla
topic: Contributions to Electromagnetic Theory
grade: 9
subject: Physics
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character: Heinrich Hertz
topic: Experimental Verification of Electromagnetic Waves
grade: 9
subject: Physics
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character: Thomas Edison
topic: Innovations in Communication Technology
grade: 9
subject: Physics
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