Abu Ali al Hasan ibn Al-Hazan ibn al- Haytham ( known in western sandwich world as Alhazen) is a great scientist and has made  pregnant contributions to the principles of optics. Ibn al-Haytham is regarded as the father of optics for his influential The Book of Optics, which mightily explained and proved the modern intromission theory of visual perception. His earn includes a study on the reflection and refraction with pull in experiments with the help of different (spherical, parabolic, cylindrical, concave and convex).
He is the person who scratch found the relationship between light sources, lens and final result see. He also explained how an eye can see. He state that we can only see when light falls on that object and reflect back to our eyes. His optical work ca employ him to pooh-pooh the false common sense idea of some antediluvian Greeks, that rays of light go out from our eyes to the objects we see. He systematically summarized what was known about vision. He used geometry and experimental observation to develop the theories and explore new phenomena. Al Haytham adopted al Kindis idea that light radiates in all directions from individually point of object. Each points on objects emits or reflects light rays in all direction and those rays that enter the eye produce image.
Ibn al-Haytham is also credited with the invention of the camera obscura or pinhole camera. He experimented with dark chamber into which light entered small hole to sour inverted. The pinhole camera works because the aperture is so small that only infinitesimal beam of light passes from each object point. He used image produced by pinhole to prove that light rays travel in straight line within a homogeneous average and pass through small aperture without interacting. This is how he discovered that the image appears upside down inside the room, then paved the course to inventing the camera.
Besides that, he studied lenses and mirrors, working out that that the...If you penury to get a full essay, order it on our website: Orderessay
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