Noun
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)
Source: WordNetBut contrary to Howard, he explained why Ibn al-Haytham did not give the circular figure of the horopter and why, by reasoning experimentally, he was in fact closer to the discovery of Panum's fusional area than that of the Vieth-Müller circle. Source: Internet
Ibn al-Haytham (Alhacen), in his Book of Optics (1021), expanded the principle to both reflection and refraction, and expressed an early version of the principle of least time. Source: Internet
Ibn al-Haytham is said to have pretended to be mad to escape the wrath of a ruler. Source: Internet
Ibn al-Haytham realized that smaller holes would create sharper images. Source: Internet
Ibn al-Haytham was the first mathematician to derive the formula for the sum of the fourth powers, using a method that is readily generalizable for determining the general formula for the sum of any integral powers. Source: Internet
Natural philosophy (particularly Aristotelian physics ) was separated from astronomy by Ibn al-Haytham (Alhazen) in the 11th century, by Ibn al-Shatir in the 14th century, Roshdi Rashed (2007). Source: Internet