what is photographic emulsion
photographic emulsion - a light-sensitive coating on paper or film; consists of fine grains of silver bromide suspended in a gelatin. emulsion. coating, coat - a thin layer covering something; a second coat of paint. silver nitrate - a nitrate used in making photographic emulsions; also used in medicine as a cautery and as a topical antibacterial agent. silver bromide - a bromide that darkens when exposed to light; used in making photographic emulsions.