Which statement about the developing solution is true?

Which statement about the developing solution is true?

• A. It reduces exposed silver halide crystals to metallic silver
• B. It oxidizes exposed crystals
• C. It dissolves the crystals
• D. It coats the film with a protective layer

Answer: (D)

The developing solution works by chemically reducing the exposed silver halide crystals in the film emulsion to metallic silver, which forms the visible image. This step creates the darker areas corresponding to where the film was exposed. It does not oxidize or dissolve the crystals, and it does not coat the film with a protective layer. The protective coating is part of the film’s construction or added in a later finishing step, not produced by the developer.

The developing solution works by chemically reducing the exposed silver halide crystals in the film emulsion to metallic silver, which forms the visible image. This step creates the darker areas corresponding to where the film was exposed. It does not oxidize or dissolve the crystals, and it does not coat the film with a protective layer. The protective coating is part of the film’s construction or added in a later finishing step, not produced by the developer.