La sedia di Piekara, un modello meccanico dei livelli energetici degli atomi (Traduzione da The Physics Teacher, vol. 29, n. 4, Aprile 1991 a cura di Silvia Pugliese Jona)

Piekara’s Chair is a macroscopic, classical model useful for explaining several atomic physics concepts and phenomena such as energy levels, spontaneous and stimulated emission, absorption and Boltzmann statistics. In this article the Model is described and possible classroom uses are suggested.