character: Richard Feynman
topic: Quantum Electrodynamics
grade: 12
subject: History
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character: Albert Einstein
topic: Photoelectric Effect
grade: 12
subject: History
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character: Paul Dirac
topic: Quantum Theory
grade: 12
subject: History
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character: Niels Bohr
topic: Wave-Particle Duality
grade: 12
subject: History
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