Analysis of information sources in references of the Wikipedia article "Kûhî" in Turkish language version.
The Perian Abu Sahl Wajjan Ibn Rustam Al-Quhi, also known as Abu Sahl Al-Kuhi or just Kuhi, studied optics and investigated the optical properties of mirrors made from conic sections
The Perian Abu Sahl Wajjan Ibn Rustam Al-Quhi, also known as Abu Sahl Al-Kuhi or just Kuhi, studied optics and investigated the optical properties of mirrors made from conic sections