Like the measurements of Aristarchus and Eratosthenes, this calculation of Alhazen is simple enough in theory.
A later edition was published, together with a translation of Alhazen, by F. Risner in 1572.
The course of investigation, as regards light, was resumed in 1100 by an Arabian philosopher named Alhazen.
Pre-eminent among Arabian scientists is Alhazen, who flourished in the 11th century.
Alhazen discovered atmospheric refraction, and showed that we see the sun and the moon after they have set.
