Abu Ali Hassan Ibn-al-Haitham

Abu Ali Hassan Ibn-al-Haitham

September 25, 2022

 Abu Ali Hassan Ibn-al-Haitham

●Abu Ali Hassan Ibn-al-Haitham (965-1039 A_D) • 

●Abu Ali Hassan Ibn al Haitham was born in Basra a renowned city of iraq. 

• He invented pinhole camera. 

• He was first to give two laws of reflection.

 • He discovered the nature of light and declared it is form of energy .

• He was a great scholar of Physics, Mathematics, engineering, astron-omy and medicine. He wrote many books on various subjects. 

His book on optics, “kitabul Manazir" , gained great reputation among scholars. 

• In this book he criticized the theory about the nature of light, pre-sented by the great philosophers of the past such as Ptolemy and Euclid. It was his courage that he refuted this theory on practical ground.According to this theory firstly light enters the eye then emits in the form of rays from the eye.

 These rays fall on the object and make it visible. But Al Haitham pointed out that when light is incident on an object sum of it is reflected back and enters the eye.

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