Also known as Alhazen, Ibn al-Haytham was an Arab mathematician, astronomer, and physicist. Optics, perhaps his most significant work, introduced the idea that light rays emanate in straight lines in all directions from every point on a luminous surface. Latin translations of this work influenced both Kepler and Descartes. Alhazen is considered the “father of optics” for his experiments with lenses, mirrors, refraction, and reflection. What lunar phenomenon was named in his honor? Discuss