Who has been dubbed the "father of optics",  Ibn al-Haytham or Ibn Yunus?
Ibn al-Haytham:  Ibn al-Haytham made significant contributions to the principles of optics, astronomy, mathematics and visual perception. Ibn Yunus: Abu al-Hasan 'Ali ibn 'Abd al-Rahman ibn Ahmad ibn Yunus al-Sadafi al-Misri (Arabic: ابن يونس) (c. 950-1009) was an important Egyptian Muslim astronomer and mathematician, whose works are noted for being ahead of their time, having been based on meticulous calculations and attention to detail.
i don't know