Photography is the method of making pictures by means of capturing light on a light-sensitive medium, such as a sensor or film. Light patterns reflected or emitted from objects are recorded onto a sensitive medium or storage chip through a timed exposure. The process is done through mechanical, chemical or digital devices well-known as cameras.
The word comes from the Greek words phos ("light"), and graphis ("stylus", "paintbrush") or graphê, together meaning "drawing with light" or "representation by means of lines" or "drawing." usually the product of photography has been called a photograph. The term photo is an abbreviation; many people also call them pictures. In digital photography, the term image has begun to replace photograph.