character: Guglielmo Marconi
topic: Radio Transmission
grade: 12
subject: Physics
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character: Nikola Tesla
topic: Electromagnetic Waves
grade: 12
subject: Physics
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character: James Clerk Maxwell
topic: Theory of Electromagnetism
grade: 12
subject: Physics
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character: Heinrich Hertz
topic: Properties of Radio Waves
grade: 12
subject: Physics
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