character: Mr. Johnson
topic: How Antennas Work with Radio Waves
grade: 11
subject: Physics
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character: Ms. Smith
topic: The Basics of Electromagnetic Waves
grade: 11
subject: Physics
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character: Mr. Lee
topic: Understanding Wave Propagation
grade: 11
subject: Physics
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character: Dr. Davis
topic: Technologies Using Radio Frequencies
grade: 11
subject: Physics
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