Born on 940 Died on 1000
Mathematician who wrote a treatise On Burning Mirrors and Lense. Rashed (1990) credited Ibn Sahl with discovering the law of refraction, usually called Snell's law.
Died on 845
With Ibn Sa'ad begins a new genre which initiates biographies of Tabaqats (classes). His treatise Kitâb al-Tabaqat al-Kabîr (the Great Book of Classes) deals with the biographies of the Prophet (pbuh) and his companions and later dignitaries of Islam till 845. For more detail click here.
Born on 980 Died on 1037
The famous Muslim philosopher and scientist whose leadership is proved by his title, al-Shaykh al-Ra'īs. He was born in 980 in Kharmaithen (near Bukhara, now in Uzbekistan), and died in June 1037 in Hamadan (now in Iran). He wrote almost 450 works on a wide range of subjects, of which around 240...
Died on 1497
Abu Ishak Ibrahim ibn Hilal al-Sijilmasi was a Moroccan legal scholar well known for his verdicts (fatwas). He is the author of al-Durr al-nathīr alá Ajwibat Abī al-Hasan al-Saghīr, Hādhihi ajwibat al-Imām ibn Hilāl and a commentary on Misbah al-arwah fi usul al falah.