character: Einstein
topic: Quantum Theory of Light
grade: 9
subject: Physics
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character: Max Planck
topic: Photoelectric Effect
grade: 9
subject: Physics
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character: Niels Bohr
topic: Atomic Model and Light
grade: 9
subject: Physics
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character: Louis de Broglie
topic: Wave-Particle Duality
grade: 9
subject: Physics
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