Abu 'Ali al-Hasan Also known as Alhazen (ăl-hăz′ən) 965?-1040?
[ ĭb′ən ĕl-hī′thəm ]
Arab mathematician who wrote almost 100 works on mathematics, astronomy, philosophy, and medicine, but who is best known for his book on optics, which became very influential in Europe after it was translated in the 13th 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.
Lions and Tigers and Bears, Et Al.Et al. is used to shorten the list of names when a writer refers to a book, article or other published work that has three or more authors. Et al. means “and others.” It’s an abbreviation of the Latin et alii. It’s mainly used by academic writers when they cite other authors’ work in a paper or article. In popular media, et al. may be …
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