Photographic films are light-sensitive materials used to capture images in photography. They consist of a thin layer of emulsion coated on a flexible base, usually made of plastic. When exposed to light, the emulsion undergoes a chemical change, creating a latent image that can be developed into a visible photograph. There are different types of photographic films, including black-and-white, color negative, and color reversal films. Each type has unique characteristics and is used for various purposes, such as professional photography, artistic expression, or personal memories. The development process involves using chemicals to reveal and fix the image on the film.