Contents
Ibn al-Haytham
Explaining vision through light entering the eye and developing experimental studies of optics.
Book of Optics · Dark-room studies
- Born
- c. 965
- Birthplace
- Basra, in present-day Iraq
- Died
- c. 1040
More people
Ibn al-Haytham
A scholar of the medieval Islamic world whose work combined geometry, observation and experiment. His Book of Optics influenced later study of sight and light in Arabic and Latin traditions.
Early life
Basra origins
Was born around 965; details of his early education are limited.
Mathematical training
Developed expertise in mathematics, astronomy and natural philosophy.
Career
- Early career
Scholar in Basra
Worked on scientific and mathematical questions before moving to Egypt.
- Early 11th century
Cairo
Spent much of his mature life studying and writing in Egypt.
- c. 1011–1021
Book of Optics
Produced his major investigation of vision and light.
Contributions
Book of Optics
Analysed sight, reflection and refraction using geometry and experiments.
Dark-room studies
Explored how light passes through apertures and forms images.
Astronomical criticism
Questioned inconsistencies in inherited models of planetary motion.
Beyond optics
Later transmission
Latin translations carried his optical work into European scholarship.
Biographical caution
Stories about a Nile engineering scheme come from later accounts and should not be treated as a complete life record.
Sources & photo credit
Life, career and references ↗Image: later artistic representation, not a contemporary portrait ↗Photo: Adolph Boÿ, engraved by Jeremias Falck. Used as the frontispiece to Johannes Hevelius, Selenographia, 1647. Public domain · Original image. Cropped and displayed in monochrome.
