A History of Agriculture in India v2.c53.s7.7
A History of Agriculture in India v2.c53.s7.7
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v2.c53.s7.7
The Arabs were not merely the carriers of science, they were also innovators. In the eleventh century lived Al Hassan (A.D. 965-1039) of Basra, who deserves a place among the greatest scientists of all ages. Optics was his special subject. He corrected the mistaken notion of the Greeks that the rays of light issued from the eye. By anatomical and geometrical reasoning, he proved that the rays of light came from the object seen and impinged on the retina. There is ground for belief that Kepler borrowed his optical views from Al Hassan.