What forms an analog (film) image?

• A. Pixels
• B. Black metallic silver atoms
• C. Light photons in a lattice
• D. Chemical crystal lattices

Answer: (B)

Analog film records an image as metallic silver deposited in the emulsion. Light exposure converts exposed silver halide crystals to a state that, after development, is chemically reduced to metallic silver. These tiny silver grains form the visible image; the darker areas have more metallic silver, while lighter areas have less. So the image is literally built from black metallic silver atoms in the film, not from digital pixels, photons arranged in a lattice, or a separate crystal lattice structure.