1. Muslims - Past and Present
He concentrated on the study of light. He wanted to understand what light is, how it works, and how humans see objects. He is the one who discovered that light travels in a straight line and that the speed of light is finite. He published his book Book of Optics, where he stated his famous vision theory that every point on the object being viewed emits rays of light that travel to the viewer's eye. ...
- Word Count: 989
- Approx Pages: 4
- Grade Level: High School