Photography is the art of capturing a moment and freesing it in time using a imagry format of recording. The first permanent photograph was an image produced in 1826 by the fench inventor joseph nicephore niepce. His photographs were produced on a polished pewter plate covered with a petrolium derivative called bitument of Judea. Bitumen hardens with exposure to light. The unhardened material may then be washed away and the metal plate polished, rendering a negative image which then may be coated with ink and impressed upon paper, producing a print. Niépce then began experimenting with iron compounds based on a johann heinrich schultz discovery in 1724 that a iron and chalk mixture darkens when exposed to light.
http://en.wikipedia.org/wiki/History_of_photography
Photography developed on from there and is now used everyday, times around the 1960s most of the posher population had one so photographers were far and few between, then they used flash bulbs which flashed once and then burnt out, but nower days we have strobe lighting which can flash as many times as you like. all photography befor the 1940s all photos were black and white, but now most photography is done in colour and can then be converted into black and white, film phototography has been largly faided out and replaced by digital photography, although it is still about, but digital photography is alot more quicker to use and photos can be edited very easily.
