Ibn al-Haytham
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Whosoever seeks the truth will not proceed by studying the writings of his predecessors and by simply accepting his own good opinion of them.
— Ehsan Masood, Science and Islam p: 169
Ibn al-Haytham
Persian physicist, mathematician and astronomer (c. 965 – c. 1040)
- Fame69.9
- Momentum3.4
- Academics rank#160
Source-basedStable
- Fame69.9
- Momentum3.4
- Academics rank#160
- Wikipedia35.2K
Lived 965–1039, aged 74
AcademicsAcademic
Summary
Updated 2026-06-08
He proved light travels into the eye, not out from it — a fact that overturned a thousand years of assumption and cleared the ground for every lens, telescope, and theory of vision that followed.
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Born in Basra around 965, Ibn al-Haytham spent his working life in Fatimid Cairo, earning his keep writing treatises and tutoring nobles. Between 1011 and 1021 he completed the Kitāb al-Manāẓir, a systematic investigation of reflection, refraction, and image formation that survived in Latin and became a cornerstone text — Kepler, Galileo, Descartes, and Huygens all cited him centuries later. He was first to describe spherical aberration, the horopter, and color constancy, first to argue that vision happens in the brain and is shaped by experience, and first to insist that hypotheses be tested…
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Composite of search demand, mentions, audience & graph footprint.
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Momentum3.4
Historical25.3
Now attention7.1
Source confidence60.0
Completeness60.0
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