character: Mrs. Sarah Johnson
topic: History of X-ray discovery
grade: 11
subject: Physics
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character: Wilhelm Conrad Roentgen
topic: Discovery of X-rays
grade: 11
subject: Physics
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character: Marie Curie
topic: Radiation and its implications in Physics
grade: 11
subject: Physics
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character: Albert Einstein
topic: Theoretical advancements in Physics related to X-rays
grade: 11
subject: Physics
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