ابن سہل (ریٲضی دان)

ابن سہل (مکمل نام: Abū Sa 'd al-ʻAlâʼ ibn Sahal ʻAbou ād al-Âalāʼ bne Şahl Şahal Ş۔ ۹۴۰-۱۰۰۰ ′ اوس اَکھ فارسی ریٲضی دان تہٕ اِسلٲمی سنہری دورُک طبیعیات دان یم سُنٛد تعلق بغداد کہ بوید دربارس سٟتؠ اوس۔Enterprise of Science in Islam: New Perspectives - J۔ P۔ Hogendijk, A۔ I۔ Sabra "The first clear evidence we have of a correct understanding of Ptolemy's theory of refraction does not appear in the Arabic sources available to us until the second half of the tenth century, when the Persian mathematician al-Ala ibn Sahl was able to put Ptolemy's ideas to use in formulating entirely original geometrical arguments for the construction of burning instruments by means of refraction"http://www.iranicaonline.org/articles/optics,"There are a number of optical texts by authors with a Persian ethnicity or association۔ The earliest is Abu Saʿd al-ʿAlāʾ Ebn Sahl at the Persian Buyid court (945–1055), better known for his early conception of the “sine law of refraction” and burning mirrors (Rashed, 1990, pp۔ 464-68; 1993; 2005) than his work on optics proper (Sabra, 1989, pp۔ lix-lx; 1994)."https://ijhpm.org/index.php/IJHPM/article/download/111/62,"Exploiting  the 10th-century Persian
mathematician Ibn Sahl’s development on Ptolemy’s studies
of refraction,48 he generalized the relationship between incident
and refracted rays in a form that presaged Snell’s law."https://www.sciencelearn.org.nz/resources/1867-light-ideas-and-technology-timeline,"Persian scientist Ibn Sahl writes On burning mirrors and lenses, which sets out his understanding of how curved mirrors and lenses bend and focus light۔ He discovers a law of refraction mathematically equivalent to Snell’s law (1615)."  أمؠ سٕنٛد ناوس پیٚٹھ چھُنہٕ کینٛہہ تہِ خاص بس چھُ أمؠ سٕنٛدؠ ملکٕچ جھلک ہاونک اجازت دوان۔"Nothing in his surname and given names, however, allows us to glimpse either his country of origin or his social and religious allegiance — unless a link may be established with another Ibn Sahl of the same period, who was an astrologer concerned with mathematics; for the time being, however, this connection has no historical value." Roshdi Rashed,  Geometry and Dioptrics in Classical Islam, London (2005), p۔ 3.

 بییہٚ وُچھو 
ابن سینا

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