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Quiz on technological innovations in lighthouse illumination

đź’ˇ What was the initial improvement made to replace wood and coal fires in lighthouses?
Difficulty: Easy
🤔 Who is credited with developing the dioptric (refracting) system for lighthouse illumination using lenses?
Difficulty: Medium
🌊 Besides lenses, what additional components did Fresnel incorporate into lighthouse apparatus to capture and redirect otherwise lost light rays?
Difficulty: Hard
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