How a 10th-century Muslim physicist discovered how humans see

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Inspiring European scientists from Galileo to Kepler, Ibn al-Haytham explained as early as the 10th Century how humans see, as well as paving the way for other scientific discoveries - and photography, too

Humans see because light rays reflect off of objects making images inside our eyes. Ibn al-Haytham discovered the laws of reflection and refraction over 1,000 years ago, explaining how human vision formed, rejecting theories that emanated from other experts of the Greco-Roman era.

“Sight perceives the light and colour existing on the surface of the contemplated object,” he explained. “Vision perceives necessarily all the objects through supposed straight lines that spread themselves between the object and the central point of the sight”. On one night during his captivity, he is said to have observed light rays from the moon travelling in a straight line through a small hole of his prison cell striking one of the walls. Following this, he began experimenting using a dark box, an idea inspired by the darkness of his cell.

Born in present-day Basra, Iraq, around 965 AD, al-Haytham was considered one of the senior members of the Muslim scholars’ trio during the 10th and 11th centuries. The other two were al-Biruni and Ibn Sina .

 

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RespectIsVital Bet it didn't involve strapping a kid in the back of a chariot and heading for the nearest castle

Most Muslim scientists were from first generation muslims, but after 2-3 generations Islamic society becomes too rigid & they deny science & logic therefore when I ask Muslim Scientists you have to go 1 thousand years back. 🙂

A great scientist of great Muslim era.

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