👉 In physics and chemistry, a substance that does not emit light when exposed to an electric field or other external stimuli. Examples include gases like nitrogen (N2) and ammonia (NH3), which have no visible emission when they are heated or compressed. Nonluminescent substances can be used in various applications such as sensors, lamps, and lighting, but their ability to emit light is limited by the properties of their materials, such as transparency, refractive indices, or dielectric constant.
