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Who is Alhazen?

Alhazen: Abū ʿAlī al-Ḥasan ibn al-Ḥasan ibn al-Haytham, frequently referred to as Ibn al-Haytham, was an Arab, Muslim, scientist, polymath, mathematician, astronomer and philosopher who made significant contributions to the principles of optics, astronomy, mathematics, meteorology, visual perception and the scientific method.

  • also known as Abū ʿAlī al-Ḥasan ibn al-Ḥasan ibn al-Haytham, al-Basri, Ibn al-Haytham, Ptolemaeus Secundus, The Physicist, Alhacen
  • born on (1050 years ago) in Basra
  • ethnicity: Arabs, Persian people
  • nationality: Abbasid Caliphate
  • religion: Islam
  • profession: Physician, engineer, mathematician, scientist, writer, philosopher, astronomer, physicist
  • died on (975 years ago) in Cairo
  • written works: "Book of Optics", "Mizan AlHikmah", "Al Jami' fi Usul Al Hisab", "Taqwin Alalam", "Taswibat 'Ala Almajasti", "Itijah Al Qibla", "Harakit Alqamar", "Almuzwala Alufuqiah", "Kayfiyat Alizlal", "Alharaka Almuta'arijah", "Shukuk fi Alharaka Almuta'arijah", "Ikhtilaf Manzar Alqamar", "Analysis and Synthesis", "Balance of Wisdom", "Corrections to the Almagest", "Discourse on Place", "Exact Determination of the Pole", "Exact Determination of the Meridian", "Finding the Direction of Qibla by Calculation", "Horizontal Sundials", "Hour Lines", "Doubts Concerning Ptolemy", "Maqala fi'l-Qarastun", "On Completion of the Conics", "On Seeing the Stars", "On Squaring the Circle", "On the Burning Sphere", "On the Configuration of the World", "On the Form of Eclipse", "On the Light of Stars", "On the Light of the Moon", "On the Milky Way", "On the Nature of Shadows", "On the Rainbow and Halo", "Opuscula", "Resolution of Doubts Concerning the Almagest", "Resolution of Doubts Concerning the Winding Motion", "The Correction of the Operations in Astronomy", "The Different Heights of the Planets", "The Direction of Mecca", "The Model of the Motions of Each of the Seven Planets", "The Model of the Universe", "The Motion of the Moon", "The Ratios of Hourly Arcs to their Heights", "The Winding Motion", "Treatise on Light", "Treatise on Place", "Treatise on the Influence of Melodies on the Souls of Animals", "The optics of Ibn al-Haytham", "Shukūk ʻalá Baṭlamyūs"


Alhazen is a lunar impact crater that lies near the eastern limb of the Moon's near side. Just to the south-southeast is the crater Hansen, and to the west is the Mare Crisium. The rim of Alhazen is nearly circular, but appears highly oblong when viewed from the Earth due to foreshortening. The inner walls and the crater floor are rugged and irregular. A low ridge joins the south rim of Alhazen with the nearby Hansen. The crater is named after the Muslim Medieval scientist, Ibn al-Haytham.

  • also known as هیثم

Printed encyclopedias and other books with definitions for Alhazen

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Google previewBiographical Encyclopedia of Scientists, Third Edition (2008)

by John Daintith

Alhazen (or Abu Ali Al-Hassan Ibn Al Haytham) (c.965–1038) Arabian scientist Now the known things are of five kinds: the known in number, the known in magnitude, the known in ratio, the known in position, and the known in species...

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Alhazen's problem Meaning

Video shows what Alhazen's problem means. A mathematical problem in which lines drawn from two points in the plane of a circle must meet at a point on the ...

Scrabble value of A1L1H4A1Z10E1N1

The value of this 7-letter word is 19 points, but it's not an accepted word in the Official Scrabble Players Dictionary.

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