Ibn al-Haytham
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Ibn al-Hay·tham
(ĭb′ən ĕl-hī′thəm) Full name Abu Ali al-Hasan Ibn al-Haytham. Also known as Al·haz·en (ăl-hăz′ən) 965?-1040? Arab mathematician and astronomer best known for his book on optics, which presented experimental studies of reflection and refraction and an influential theory of vision that revised that of the Greeks.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Ibn al-Hay·tham
(ĭb′ən ĕl-hī′thəm) Latin name Al·haz·en (ăl-hăz′ən) 965?-1040? Arab mathematician who is best known for his book on optics, which became very influential in Europe after it was translated in the 12th century. It contained a detailed description of the eye and disproved the older Greek idea that vision is the result of the eye sending out rays to the object being looked at.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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| Noun | 1. |  Ibn al-Haytham - an Egyptian polymath (born in Iraq) whose research in geometry and optics was influential into the 17th century; established experiments as the norm of proof in physics (died in 1040) |
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