Ibn al-Haytham drawing taken from a 1982
Iraqi 10-dinar note.
Abū ‘Alī al-Ḥasan ibn al-
Ḥasan ibn al-Haytham
Ibn al-Haytham and Alhacen
Arab and/or Persian
Iraq (Mesopotamia) and Egypt
Mechanics, Medicine, Optics,
Physics, Psychology, Science
Pioneer in optics, scientific
method, experimental science,
experimental psychology, visual
Book of Optics, Doubts
Concerning Ptolemy, On the
Configuration of the World, The
Model of the Motions, Treatise
on Light, Treatise on Place
Influences: Aristotle, Euclid, Ptolemy, Galen,
Muhammad, Banū Mūsā, Thabit
ibn Qurra, al-Kindi, Ibn Sahl, al-
Influenced: Khayyam, al-Khazini, Averroes,
Roger Bacon, Witelo, Pecham,
Farisi, Theodoric, Gersonides,
Alfonso, von Peuerbach, Taqi al-
Din, Risner, Clavius, Kepler,
John Wallis, Saccheri
Note: This text uses special characters.
AbūʿAlī al-Ḥasan ibn al-Ḥasan ibn al-
Haytham (Arabic: ??? ???? ??? ?? ??? ??
??????, Persian: ??? ????, Latinized: Alhacen
or (deprecated) Alhazen) (965 in Basra - c.
1039 in Cairo), was an Arab or Persian
polymath. He made significant contribu-
tions to the principles of optics, as well as to
anatomy, astronomy, engineering, mathemat-
ics, medicine, ophthalmology, philosophy,
physics, psychology, visual perception, and to
science in general with his introduction of
the scientific method. He is sometimes called
al-Basri (Arabic: ??????), after his birthplace
in the city of Basra. He was also nick-
named Ptolemaeus Secundus ("Ptolemy the
Second") or simply "The Physicist"
Born circa 965, in Basra, Iraq and part of
Buyid Persia at that time, he lived mainly
in Cairo, Egypt, dying there at age 76.
Over-confident about practical application of
his mathematical k