The Complete History of Science

Islamic Developments in Optics

Mar 25, 2023
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INSIGHT

Al-Haytham's Optics Revolution

  • Al-Haytham established fundamental optics concepts: light travels straight, has finite speed, intensity fades with distance, and media affects light transmission.
  • Crucially, he showed light exists independently of vision, transforming optics into a study of light itself.
ANECDOTE

Light Straight Line Experiments

  • Al-Haytham demonstrated light travels in straight lines using experiments with dusty and dark rooms.
  • He showed light through apertures projects straight lines on walls, likely inventing the camera obscura concept.
INSIGHT

Physical Explanation of Reflection

  • Al-Haytham moved beyond math, proposing some surfaces reflect light due to smoothness, while porous materials trap light.
  • He imagined light as tiny balls bouncing off surfaces, combining physical explanation with optical math.
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