Photography is the art, science and practice of creating durable images by recording light or other electromagnetic
radiation, either chemically by means of a light-sensitive
material such as photographic film, or electronically by means of
an image
sensor.[1]
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 camera during a timed exposure.
The result in an electronic image sensor is an electrical
charge at each pixel, which is electronically processed and stored in a digital image file for subsequent display or
processing. The result in a 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.
radiation, either chemically by means of a light-sensitive
material such as photographic film, or electronically by means of
an image
sensor.[1]
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 camera during a timed exposure.
The result in an electronic image sensor is an electrical
charge at each pixel, which is electronically processed and stored in a digital image file for subsequent display or
processing. The result in a 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.
