character: William Herschel
topic: Discovery of Infrared Radiation
grade: 9
subject: Physics
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character: James Clerk Maxwell
topic: Electromagnetic Spectrum
grade: 9
subject: Physics
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character: Albert Einstein
topic: Photoelectric Effect
grade: 9
subject: Physics
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character: Niels Bohr
topic: Quantum Theory
grade: 9
subject: Physics
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