Analog photography, also known as film photography, is a catch-all term for photography that uses chemical processes to capture an image, typically on paper, film or a hard plate. These analog processes were the only methods available to photographers for more than a century prior to the invention of digital photography, which uses electronic sensors to record images to digital media. In a film camera that uses photographic emulsions, light falling upon silver halides is recorded as a latent image, which is then subjected to photographic processing, making it visible and insensitive to light.