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)
English: Alhazen, Alhacen, al-Haytham, Ibn al-Haytham, Al-Hasan ibn al-Haytham
Bahasa: Alhacen, Alhazen, Ibnu Haitham