Articoli rivista
Anno XXVI - n.3 - luglio/settembre 1993 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. […]
Anno XLII - n.1 - gennaio/marzo 2009 La serendipità nella scoperta dei raggi X e della radioattività
At the end of 1895 Röntgen discovered x-rays while investigating cathode rays; in 1896 Becquerel was searching for penetrating radiations similar to x-rays when he found the uranium rays (radioactivity). The stories of both discoveries are briefly outlined and analyzed and the role of serendipity is discussed. […]
Anno XLVII - n.4 - ottobre/dicembre 2014 La statistica con la macchina di Galton
This work proposes an example of experimental approach for the treatment of statistic matters for last classes of the secondary school. Through the construction of Galton’s machine, the validity of the central limit theorem has been shown and as the distribution of the random experimental data is described to the best by the Gauss’curve. […]
Anno XXXIV - n.4 - ottobre/dicembre 2001 La Stele di Rosetta del linguaggio genetico
The original X-ray diffraction pattern of DNA obtained in 1953 by Franklin e Gosling is discussed and explained. An experiment that shows how a similar image can be obtained with a combination of diffraction gratings is proposed. […]