Alhazen

[ ăl-hăz′ən ]

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See Ibn al-Haytham.

QUIZZES

In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”

Question 1 of 7

The rainy weather could not ________ my elated spirits on my graduation day.

In the field of physical science one of the most important of the Arabian scientists was Alhazen.
A History of Science, Volume 2(of 5)|Henry Smith Williams
That this sudden change does not occur, Alhazen explained as due to the reflection of light by the earth's atmosphere.
A History of Science, Volume 2(of 5)|Henry Smith Williams
Like the measurements of Aristarchus and Eratosthenes, this calculation of Alhazen is simple enough in theory.
A History of Science, Volume 2(of 5)|Henry Smith Williams
According to the calculation of Alhazen, this h, or the height of the atmosphere, represents from twenty to thirty miles.
A History of Science, Volume 2(of 5)|Henry Smith Williams

As regards the refraction of light, the course of real inquiry was resumed in 1100 by an Arabian philosopher named Alhazen.
Six Lectures on Light|John Tyndall