Ibn al-Haytham, Alhazen, Al-Hasan ibn al-Haytham, al-Haytham, Ibnu Haitham, Alhacen
Alhazen, Alhacen, al-Haytham, Ibn al-Haytham, Al-Hasan ibn al-Haytham
an Egyptian polymath (born in Iraq) whose research in geometry and optics was influential into the 17th century; established experiments as the norm of proof in physics (died in 1040)