Colors of Elements in a Flame - Animation
Animation of Photon Emission
The animation is highly schematic. It shows a set of energy levels for a hydrogen-like (one-electron) atom or ion. Collisions of an atom with other fast-moving atoms in the flame can raise an atom to an excited state, after which the atom can lose energy by emitting a photon. The color (wavelength) of the photon depends on the energy difference between the upper and lower energy levels.
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The name of this movie is FLAMIN.MOV and is located in the
directory/folder named MOVIES/FLAME2.
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movie.