character: Mr. Chen
topic: Signal Transmission and Modulation Techniques
grade: 11
subject: Physics
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character: Ms. Smith
topic: Wave Properties and Applications
grade: 11
subject: Physics
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character: Dr. Lee
topic: Electromagnetic Waves in Communication
grade: 11
subject: Physics
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character: Mr. Patel
topic: Introduction to Telecommunications Systems
grade: 11
subject: Physics
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