What was alhazen most famous for?

Alhazen, also known as Ibn al-Haytham, is most famous for his pioneering work in optics and the scientific method. He made significant contributions to the understanding of light and vision, particularly through his book "Book of Optics," where he formulated the theory of vision and described how light travels in straight lines. Alhazen's experimental approach laid the groundwork for modern scientific inquiry, emphasizing observation and experimentation. His influence extended beyond optics, impacting various fields such as physics and astronomy.