The word photography comes from two ancient Greek words: photo, for light, and graph, for drawing.
Photography is the process of taking pictures and it requires a camera. Cameras work basically as our eyes do. Light enters through an aperture and then passes through a lens. In a traditional camera, film received and captured the image. The film had to be taken out of the camera and developed in order to finish the process of creating a photograph. Digital cameras do not use film. Instead, they translate the image into numbers recorded on a disk inside the camera. A computer decodes these numbers and displays a picture.