character: Thomas Edison
topic: Invention of Communication Devices
grade: 10
subject: Physics
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character: Alexander Graham Bell
topic: Invention of the Telephone
grade: 10
subject: Physics
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character: Nikola Tesla
topic: Wireless Communication Principles
grade: 10
subject: Physics
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character: Guglielmo Marconi
topic: Development of Radio Technology
grade: 10
subject: Physics
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