Photography and films technology enables us to record the most important experiences and people in our lives. Chemistry developed the film for all types of traditional cameras. Battery improvements have also contributed to the popularity of the camera, including the 1950s alkaline manganese batteries that were tremendously popular in small cameras with built-in flash unit..
Being able to manipulate film, electronics, and batteries led to the 1963 introduction of Eastman Kodak's popular Instamatic camera with film cartridge that was sold over 50 millions by 1970
Reaction equation of photo development
Reaction equation of photo fixing