What are the layers of photographic film?

Question

As if, you were looking at a cross-section of a strip of film.

Answer 1

The actual "film" is called the base layer and the layer with the image is called the emulsion. Black and white film has only one emulsion layer and color films have several, with the number varying according to what kind of film it is. See: http://en.wikipedia.org/wiki/Photographic_film

Here's a nice explanation:
http://science.howstuffworks.com/film3.htm

More:
http://www.answers.com/topic/photographic-film-1