Ibn Al Haytham discovered the properties of light in that tribulation and wrote his famous book (Optics) during the time he spent in prison. He says that the light contains straight lines falling from the self-illuminating figures, like the sun, illuminated in breadth like a candle or reflected like the light of the moon carrying images. This expression is important because it is the same expression that Newton said centuries later about the nature of light (lazemtefham.com). Ibn Al Haytham also demonstrated the fact that light comes from objects to the eye and not vice versa as was believed at the time, and attributed to him the principles of the invention of