character: Guglielmo Marconi
topic: Development of radio transmission
grade: 12
subject: Physics
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character: James Clerk Maxwell
topic: Electromagnetic waves
grade: 12
subject: Physics
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character: Heinrich Hertz
topic: Experimental validation of radio waves
grade: 12
subject: Physics
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character: Nikola Tesla
topic: Alternating current and early radio experiments
grade: 12
subject: Physics
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