The Four Islamic Scholars

Al – Razi   

Al – Razi discovered smallpoxs and how they are different than measles they might have some of the same symptoms but they are two different desisis. He also performed some surgeries and a kidney stone removal.

Al- Hazen 

Al – Hazen came up with the theory of eyesight. There were two competing theories of vision. One of the theories was by Plato his theory about eyesight was the emission theory. The emission theory is that a light ray is produced inside our eyeballs. They exit our eyeballs so then the ray strikes a foren object and when the ray strikes an foren object that is what produces an image in our mind.

 Aristotle’s theory was the intromission theory. It was about how objects enter our eyes and not exit our eyes. But Al- Hazen rejected Plato’s theory. Al- Hazen used his own insights. And got an idea from Al- Kinadi. Al- Kinadi was the peronit of the intromission theory. but nevertheless Al-Hazen  used his own intellect to come up with a new kind of intromission theory. This new intromission theory was how instead of one ray there was more than one ray created by different point sources for the object. The multiple rays inter your eye at a single point. Al-Hazen wrote hundreds of books. He made significant contributions to the field of optics and human esperamanton. 

Al-Khwaizmi 

Al-Khwarizmi discovered algebra. The process algebra is the balance of numbers from the equation. Add a number to one side of the equation and to the other side of the equation or subtracting from both sides of the equation, multapling, dividing to both sides of of the equation he would do that and then simplify the equation to solve the unknown.

Al- kindi 

Al- kindi used frequency analis with cryptanalysis. 

Aristotelian physics and the focus on the heavenly circles held back the Islamic scholarship from full science as we know it today.