character: Sir Isaac Newton
topic: Reflection and Refraction of Light
grade: 9
subject: Physics
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character: Optics
topic: Principles of Reflection
grade: 9
subject: Physics
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character: Medium
topic: Effect on Light Refraction
grade: 9
subject: Physics
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character: Snell's Law
topic: Calculating Angles of Refraction
grade: 9
subject: Physics
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