Vintage Bulb Spectra: emission line spectra identify the gas within these two vintage discharge glow bulbs- revealed here by a 500 line/mm diffraction grating. The color of each gas is due to a mix of the colors emitted from electron energy transitions specific to each element, the basis of spectroscopy. ➡️ Follow the link in my profile for info on where to get a diffraction grating slide and many other amazing items featured here on @physicsfun #physics #physicstoy #physicsfun #neon #argon #emi