character: Mr. Thompson
topic: Introduction to Waves and Their Properties
grade: 9
subject: Physics
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character: Ms. Smith
topic: Understanding Sound Waves
grade: 9
subject: Physics
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character: Mr. Lee
topic: Light Waves and Their Behavior
grade: 9
subject: Physics
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character: Dr. Johnson
topic: Electromagnetic Waves: Theory and Applications
grade: 9
subject: Physics
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