Photography

Photography is the art, application and practice of creating durable images by recording

light or other electromagnetic radiation, either electronically by means of an image

sensor, or chemically by means of a light-sensitive material such as photographic film.

It is employed in many fields of science, manufacturing (e.g., photolithography), and

business, as well as its more direct uses for art, film and video production, recreational

purposes, hobby, and mass communication. Typically, a lens is used to focus the light

reflected or emitted from objects into a real image on the light-sensitive surface inside a

cameraduring a timed exposure. With an electronic image sensor, this produces an

electrical charge at each pixel, which is electronically processed and stored in a digital

image file for subsequentdisplay or processing. The result with photographic emulsion is

an invisible latent image, which is later chemically "developed" into a visible image, either

negative or positive depending on the purpose of the photographic material and the

method of processing. A negative image on film is traditionally used to photographically

create a positive image on a paper base, known as a print, either by using an enlarger or

by contact printing.