character: Niels Bohr
topic: Development of Quantum Mechanics
grade: 12
subject: History
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character: Albert Einstein
topic: Photoelectric Effect and Quantum Theory
grade: 12
subject: History
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character: Max Planck
topic: Origin of Quantum Theory
grade: 12
subject: History
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character: Werner Heisenberg
topic: Uncertainty Principle and Quantum Mechanics
grade: 12
subject: History
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