Certified Professional Photographer (CPP) Practice Exam

What are halogen compounds of silver commonly paired with in photography?

1. Carbon

2. Gases

3. Gels

4. Halides

The correct answer is: Halides

Halogen compounds of silver, such as silver bromide, silver chloride, and silver iodide, are essential in photography, particularly in film and photographic paper. These compounds are classified as halides because they are formed by the interaction of silver with halogen elements (like bromine, chlorine, and iodine). In photographic processes, the photosensitivity and light-reactive properties of these silver halides are utilized to capture images. When light exposes these halides, they undergo a chemical change, which ultimately allows for the development of a latent image that can be made visible through further chemical processing. This foundational interaction between silver and halogen elements is critical in all traditional photographic techniques, making halides integral to the process. The other options do not hold the same relevance in the context of photography involving silver compounds. While carbon, gases, and gels may relate to different aspects of photography (like film types, lighting conditions, or image processing), they are not paired with silver compounds in the same fundamental way that halides are. Halogen compounds specifically highlight the significant role of halides in the process of capturing photographic images.