character: Dr. Lee
topic: Applications of Sound and Light Waves
grade: 11
subject: Physics
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character: Mr. Johnson
topic: Reflection and Refraction of Light Waves
grade: 11
subject: Physics
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character: Ms. Smith
topic: Sound Waves in Communication Technology
grade: 11
subject: Physics
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character: Dr. Patel
topic: Interference Patterns of Light Waves
grade: 11
subject: Physics
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