By the time of his release, Alhazen had written most of his seven - volume Book of Optics, considered to be “one of the most important books in the history of physics. ”
Pada saat dibebaskan, Al - Hasan sudah hampir menyelesaikan tujuh jilid Book of Optics, yang dianggap ” salah satu buku paling penting dalam sejarah fisika ”.