The immediate source of the colored light produced by neon signs is the excitation of gas particles within the tube when a stream of electrons passes through. This process involves electrons colliding with gas particles, which excites them to higher energy levels. As these electrons return to their original states, they emit light, with the color determined by the specific energy levels of the gas used and the voltage applied across the tube. Neon gas specifically contributes to the characteristic colors observed in neon signs.
PREREQUISITESThis discussion is beneficial for electrical engineers, physicists, and anyone interested in the technology behind neon signage and gas discharge lighting systems.