How an image is formed

The camera obscura can not capture objects in movement and it can't focus in on things and have to get parts you may not want in the picture.

An emulsion is a solid that is stuck in some kind of liquid. Light colors come out dark on the negatives and dark colors come out light. The reason it does that is because when you take the picture the crystals bunch up real tightly when there is a light color and when there is a dark color the sort of spread out which causes it to be light.

Digital cameras and film cameras both have a series of lenses that focus light to create an image of a scene. But digitial cameras have a built-in computer and records images electronically.